Soil , also commonly referred to as earth , is a mixture of organic matter , minerals , gases , liquids , and organisms that together support the life of plants and soil organisms . Some scientific definitions distinguish dirt from soil by restricting the former term specifically to displaced soil.
106-642: Island Gardens is a public park located at the southern end of the Isle of Dogs in the London Borough of Tower Hamlets on the north bank of the River Thames . The park was formally opened on 3 August 1895 by local politician Will Crooks . The 1.12-hectare (2.8-acre) waterside park is notable for its cross-river view of the classical buildings of the former Greenwich Hospital , the Cutty Sark and
212-662: A porous phase that holds gases (the soil atmosphere) and water (the soil solution). Accordingly, soil is a three- state system of solids, liquids, and gases. Soil is a product of several factors: the influence of climate , relief (elevation, orientation, and slope of terrain), organisms, and the soil's parent materials (original minerals) interacting over time. It continually undergoes development by way of numerous physical, chemical and biological processes, which include weathering with associated erosion . Given its complexity and strong internal connectedness , soil ecologists regard soil as an ecosystem . Most soils have
318-658: A Unilateral Declaration of Independence. They even applied to join the United Nations, warning that UN peacekeeping troops might be needed to keep the Greater London Council from evicting them. While successive Labour and Conservative governments proposed a number of action plans during the 1970s, it was not until 1981 that the London Docklands Development Corporation (LDDC) was established to redevelop
424-603: A decline. However, parts of the launching slipway and plate works have been preserved in situ and may be seen close to Masthouse Terrace Pier . The urbanisation of the Isle of Dogs took place in the 19th century following the construction of the West India Docks , which opened in 1802. This heralded the area's most successful period, when it became an important centre for trade. The East India Docks were subsequently opened in 1806, followed by Millwall Dock in 1868. By
530-643: A dry bulk density (density of soil taking into account voids when dry) between 1.1 and 1.6 g/cm , though the soil particle density is much higher, in the range of 2.6 to 2.7 g/cm . Little of the soil of planet Earth is older than the Pleistocene and none is older than the Cenozoic , although fossilized soils are preserved from as far back as the Archean . Collectively the Earth's body of soil
636-451: A medium for plant growth , making it a critically important provider of ecosystem services . Since soil has a tremendous range of available niches and habitats , it contains a prominent part of the Earth's genetic diversity . A gram of soil can contain billions of organisms, belonging to thousands of species, mostly microbial and largely still unexplored. Soil has a mean prokaryotic density of roughly 10 organisms per gram, whereas
742-419: A net absorption of oxygen and methane and undergo a net release of carbon dioxide and nitrous oxide . Soils offer plants physical support, air, water, temperature moderation, nutrients, and protection from toxins. Soils provide readily available nutrients to plants and animals by converting dead organic matter into various nutrient forms. Components of a silt loam soil by percent volume A typical soil
848-549: A pH of 9, plant growth is reduced. High pH results in low micro-nutrient mobility, but water-soluble chelates of those nutrients can correct the deficit. Sodium can be reduced by the addition of gypsum (calcium sulphate) as calcium adheres to clay more tightly than does sodium causing sodium to be pushed into the soil water solution where it can be washed out by an abundance of water. There are acid-forming cations (e.g. hydronium, aluminium, iron) and there are base-forming cations (e.g. calcium, magnesium, sodium). The fraction of
954-474: A practice of various watersports, like sailing , kayaking , windsurfing and standup paddleboarding . Docklands Sailing and Watersports Centre is one of the main reference spots for watersports fans. The Duchess of Cambridge visited the centre in 2017. The Isle of Dogs was the title of an early play by Ben Jonson and Thomas Nashe , briefly performed in 1597 and then thoroughly suppressed as slanderous . T.S. Eliot 's The Waste Land contains
1060-731: A result of a trade-off between toxicity and requirement most nutrients are better available to plants at moderate pH, although most minerals are more soluble in acid soils. Soil organisms are hindered by high acidity, and most agricultural crops do best with mineral soils of pH 6.5 and organic soils of pH 5.5. Given that at low pH toxic metals (e.g. cadmium, zinc, lead) are positively charged as cations and organic pollutants are in non-ionic form, thus both made more available to organisms, it has been suggested that plants, animals and microbes commonly living in acid soils are pre-adapted to every kind of pollution, whether of natural or human origin. In high rainfall areas, soils tend to acidify as
1166-401: A result, layers (horizons) form in the soil profile. The alteration and movement of materials within a soil causes the formation of distinctive soil horizons . However, more recent definitions of soil embrace soils without any organic matter, such as those regoliths that formed on Mars and analogous conditions in planet Earth deserts. An example of the development of a soil would begin with
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#17327810631031272-412: A soil can be said to be developed, and can be described further in terms of color, porosity, consistency, reaction ( acidity ), etc. Water is a critical agent in soil development due to its involvement in the dissolution, precipitation, erosion, transport, and deposition of the materials of which a soil is composed. The mixture of water and dissolved or suspended materials that occupy the soil pore space
1378-399: A soil determines its ability to supply available plant nutrients and affects its physical properties and the health of its living population. In addition, a soil's chemistry also determines its corrosivity , stability, and ability to absorb pollutants and to filter water. It is the surface chemistry of mineral and organic colloids that determines soil's chemical properties. A colloid
1484-472: A valence of two, converts to (40 ÷ 2) × 1 milliequivalent = 20 milliequivalents of hydrogen ion per 100 grams of dry soil or 20 meq/100 g. The modern measure of CEC is expressed as centimoles of positive charge per kilogram (cmol/kg) of oven-dry soil. Most of the soil's CEC occurs on clay and humus colloids, and the lack of those in hot, humid, wet climates (such as tropical rainforests ), due to leaching and decomposition, respectively, explains
1590-573: Is Canary Wharf on the Jubilee line . Key areas including Regent's Park , The West End , Westminster , South Bank , Millennium Dome and the Queen Elizabeth Olympic Park , are all within 20 minutes of Canary Wharf by Tube. The DLR runs north–south through the Isle of Dogs. Docklands Light Railway stations are Canary Wharf , Heron Quays , South Quay , Crossharbour , Mudchute and Island Gardens . Key areas including
1696-553: Is 0.04%, but in the soil pore space it may range from 10 to 100 times that level, thus potentially contributing to the inhibition of root respiration. Calcareous soils regulate CO 2 concentration by carbonate buffering , contrary to acid soils in which all CO 2 respired accumulates in the soil pore system. At extreme levels, CO 2 is toxic. This suggests a possible negative feedback control of soil CO 2 concentration through its inhibitory effects on root and microbial respiration (also called soil respiration ). In addition,
1802-459: Is a list of purchases, which includes: A hose for the Mary George, in dock at the Isle of Dogs, 10d The 1898 edition of Brewer's Dictionary of Phrase and Fable attributes the name: "So called from being the receptacle of the greyhounds of Edward III . Some say it is a corruption of the Isle of Ducks, and that it is so called in ancient records from the number of wild fowl inhabiting
1908-603: Is a measure of the acidity or alkalinity of the soil. More precisely, it is a measure of hydronium concentration in an aqueous solution and ranges in values from 0 to 14 (acidic to basic) but practically speaking for soils, pH ranges from 3.5 to 9.5, as pH values beyond those extremes are toxic to life forms. At 25 °C an aqueous solution that has a pH of 3.5 has 10 moles H 3 O (hydronium ions) per litre of solution (and also 10 moles per litre OH ). A pH of 7, defined as neutral, has 10 moles of hydronium ions per litre of solution and also 10 moles of OH per litre; since
2014-509: Is a small, insoluble particle ranging in size from 1 nanometer to 1 micrometer , thus small enough to remain suspended by Brownian motion in a fluid medium without settling. Most soils contain organic colloidal particles called humus as well as the inorganic colloidal particles of clays . The very high specific surface area of colloids and their net electrical charges give soil its ability to hold and release ions . Negatively charged sites on colloids attract and release cations in what
2120-411: Is about 50% solids (45% mineral and 5% organic matter), and 50% voids (or pores) of which half is occupied by water and half by gas. The percent soil mineral and organic content can be treated as a constant (in the short term), while the percent soil water and gas content is considered highly variable whereby a rise in one is simultaneously balanced by a reduction in the other. The pore space allows for
2226-424: Is also a net sink of methane (CH 4 ) but a net producer of methane (a strong heat-absorbing greenhouse gas ) when soils are depleted of oxygen and subject to elevated temperatures. Soil atmosphere is also the seat of emissions of volatiles other than carbon and nitrogen oxides from various soil organisms, e.g. roots, bacteria, fungi, animals. These volatiles are used as chemical cues, making soil atmosphere
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#17327810631032332-556: Is an important characteristic of soil. This ventilation can be accomplished via networks of interconnected soil pores , which also absorb and hold rainwater making it readily available for uptake by plants. Since plants require a nearly continuous supply of water, but most regions receive sporadic rainfall, the water-holding capacity of soils is vital for plant survival. Soils can effectively remove impurities, kill disease agents, and degrade contaminants , this latter property being called natural attenuation . Typically, soils maintain
2438-464: Is assumed acid-forming cations). Base saturation is almost in direct proportion to pH (it increases with increasing pH). It is of use in calculating the amount of lime needed to neutralise an acid soil (lime requirement). The amount of lime needed to neutralize a soil must take account of the amount of acid forming ions on the colloids (exchangeable acidity), not just those in the soil water solution (free acidity). The addition of enough lime to neutralize
2544-414: Is called the pedosphere . The pedosphere interfaces with the lithosphere , the hydrosphere , the atmosphere , and the biosphere . Soil has four important functions : All of these functions, in their turn, modify the soil and its properties. Soil science has two basic branches of study: edaphology and pedology . Edaphology studies the influence of soils on living things. Pedology focuses on
2650-401: Is called the soil solution. Since soil water is never pure water, but contains hundreds of dissolved organic and mineral substances, it may be more accurately called the soil solution. Water is central to the dissolution , precipitation and leaching of minerals from the soil profile . Finally, water affects the type of vegetation that grows in a soil, which in turn affects the development of
2756-421: Is dependent on the type of parent material , the processes that modify those parent materials, and the soil-forming factors that influence those processes. The biological influences on soil properties are strongest near the surface, though the geochemical influences on soil properties increase with depth. Mature soil profiles typically include three basic master horizons: A, B, and C. The solum normally includes
2862-401: Is induced. Capillary action is responsible for moving groundwater from wet regions of the soil to dry areas. Subirrigation designs (e.g., wicking beds , sub-irrigated planters ) rely on capillarity to supply water to plant roots. Capillary action can result in an evaporative concentration of salts, causing land degradation through salination . Soil moisture measurement —measuring
2968-531: Is likely home to 59 ± 15% of the species on Earth. Enchytraeidae (worms) have the greatest percentage of species in soil (98.6%), followed by fungi (90%), plants (85.5%), and termites ( Isoptera ) (84.2%). Many other groups of animals have substantial fractions of species living in soil, e.g. about 30% of insects , and close to 50% of arachnids . While most vertebrates live above ground (ignoring aquatic species), many species are fossorial , that is, they live in soil, such as most blind snakes . The chemistry of
3074-477: Is more advanced. Most plant nutrients, with the exception of nitrogen , originate from the minerals that make up the soil parent material. Some nitrogen originates from rain as dilute nitric acid and ammonia , but most of the nitrogen is available in soils as a result of nitrogen fixation by bacteria . Once in the soil-plant system, most nutrients are recycled through living organisms, plant and microbial residues (soil organic matter), mineral-bound forms, and
3180-409: Is referred to as cation exchange . Cation-exchange capacity is the amount of exchangeable cations per unit weight of dry soil and is expressed in terms of milliequivalents of positively charged ions per 100 grams of soil (or centimoles of positive charge per kilogram of soil; cmol c /kg ). Similarly, positively charged sites on colloids can attract and release anions in the soil, giving
3286-545: Is very little organic material. Basaltic minerals commonly weather relatively quickly, according to the Goldich dissolution series . The plants are supported by the porous rock as it is filled with nutrient-bearing water that carries minerals dissolved from the rocks. Crevasses and pockets, local topography of the rocks, would hold fine materials and harbour plant roots. The developing plant roots are associated with mineral-weathering mycorrhizal fungi that assist in breaking up
Island Gardens - Misplaced Pages Continue
3392-595: The City of London , Tower Hill and Greenwich are all within 20 minutes of the Isle of Dogs by DLR. The Elizabeth line 's Canary Wharf station opened in 2022. Situated at the north of the Island, it provides high-frequency, fast connections to the heart of the West End , Paddington Station , Heathrow Airport and Abbey Wood . Regular commuter boat services serve both Masthouse Terrace Pier and Canary Wharf Pier on
3498-774: The National Maritime Museum , with Greenwich Park forming a backdrop. The northern entrance of the Greenwich foot tunnel is also within the park. It is almost certain that the view from this location is the one that the Canaletto painting "Greenwich Hospital from the North Bank of the Thames" is taken from, though whether Canaletto himself actually visited the site is in doubt. The park also gave its name to Island Gardens DLR station . This opened in 1987 as
3604-514: The Port of London Authority took control of the docks. With the docks stretching across from East to West with locks at each end, the Isle of Dogs could now almost be described as a genuine island. Dock workers settled on the "island" as the docks grew in importance, and by 1901, 21,000 people lived there, largely dependent on the river trade on the Isle as well as in Greenwich and Deptford across
3710-490: The aeration of the soil and the ability of water to infiltrate and to be held within the soil. Soil water content can be measured as volume or weight . Soil moisture levels, in order of decreasing water content, are saturation, field capacity , wilting point , air dry, and oven dry. Field capacity describes a drained wet soil at the point water content reaches equilibrium with gravity. Irrigating soil above field capacity risks percolation losses. Wilting point describes
3816-561: The humus form ), the copedon (in intermediary position, where most weathering of minerals takes place) and the lithopedon (in contact with the subsoil). The soil texture is determined by the relative proportions of the individual particles of sand , silt , and clay that make up the soil. The interaction of the individual mineral particles with organic matter, water, gases via biotic and abiotic processes causes those particles to flocculate (stick together) to form aggregates or peds . Where these aggregates can be identified,
3922-425: The mineralogy of those particles can strongly modify those properties. The mineralogy of the finest soil particles, clay, is especially important. Large numbers of microbes , animals , plants and fungi are living in soil. However, biodiversity in soil is much harder to study as most of this life is invisible, hence estimates about soil biodiversity have been unsatisfactory. A recent study suggested that soil
4028-497: The 1880s, the casual employment system caused Dock workers to unionise under Ben Tillett and John Burns . This led to a demand for 6d per hour (2.5p), and an end to casual labour in the docks. After a bitter struggle, the London Dock Strike of 1889 was settled with victory for the strikers, and established a national movement for the unionisation of casual workers. The three dock systems were unified in 1909 when
4134-400: The 1980 British film The Long Good Friday , and the Isle of Dogs is the primary location of the 2007 horror film 28 Weeks Later , where it is the only secure and quarantined area in all of Britain suitable for recivilisation after a virus epidemic kills the population of the country. Soil Soil consists of a solid phase of minerals and organic matter (the soil matrix), as well as
4240-448: The A and B horizons. The living component of the soil is largely confined to the solum, and is generally more prominent in the A horizon. It has been suggested that the pedon , a column of soil extending vertically from the surface to the underlying parent material and large enough to show the characteristics of all its horizons, could be subdivided in the humipedon (the living part, where most soil organisms are dwelling, corresponding to
4346-589: The Canary Wharf Tower, is the second tallest habitable building in Britain at 244 metres (801 ft). The peninsula is an area of social extremes, comprising some of the most prosperous and most deprived areas of the country; in 2004, nearby Blackwall was the 81st most deprived ward in England out of over 8,000, while the presence of Canary Wharf gives the area one of the highest average incomes in
Island Gardens - Misplaced Pages Continue
4452-560: The Greenwich Peninsula. Between 1986 and 1992 it enjoyed a brief formal existence, as the name Isle of Dogs was applied to one of seven neighbourhoods to which power was devolved from the council. The neighbourhood was later abolished. It was the site of the highest concentration of council housing in England but is now best known as the location of the Canary Wharf office complex. One Canada Square , also known as
4558-481: The Isle of Dogs – Cubitt Town Junior School, Arnhem Wharf, Harbinger School and St Edmunds. There was also an independent primary school, River House Montessori, located near South Quay, but this closed in 2024. George Green's School is a secondary school and Specialist Humanities School at the southern tip of the island. Canary Wharf College is a free school on the Island which covers primary and secondary education. The nearest London Underground station
4664-531: The Isle of Dogs. Following the building of the Docks (especially the West India Docks and the adjacent City Canal ), and with an increasing population, locals increasingly referred to the area as The Island . This area includes Millwall , Cubitt Town , and Blackwall . The south of the isle opposite Greenwich was once known as North Greenwich , now applied to the area around the Millennium Dome on
4770-432: The Isle of Dogs. The Thames Clippers provides regular commuter services to Woolwich Arsenal Pier , Greenwich Pier in the east, and the City of London including St. Katherine Docks, Tower Bridge , HMS Belfast , Greater London Authority building, Tate Modern , Blackfriars , as well as the West End of London in the west on the commuter service. There is also a connecting shuttle service to Rotherhithe and
4876-640: The Isle of Dogs. It became part of an enterprise zone , which covered 1.95 km of land and encompassed the West India, Millwall and East India Docks. New housing, office space and transport infrastructure were built. This included the Docklands Light Railway and later the Jubilee line extension, which eventually brought access to the London Underground to the area for the first time. Since its construction in 1987–1991,
4982-534: The Isle of Dogs. Records show that ships preparing to carry the English royal household to Calais in 1520 docked at the southern bank of the island. The name Isle of Dogges occurs in the Thamesis Descriptio of 1588, applied to a small island in the south-western part of the peninsula. The name is next applied to the Isle of Dogs Farm (originally known as Pomfret Manor ) shown on a map of 1683. At
5088-403: The Isle of Dogs”. They were protesting the lack of social services provided by the Greater London Council, as well as the mass unemployment among former dockyard workers. Led by Labour councilor Ted Johns, the inhabitants of the island barricaded the main roads, isolating it from the rest of London for ten days. On 10 March, Tower Hamlets Council presented plans for investment and improvement of
5194-505: The Tate to Tate service from Tate Modern to Tate Britain via London Eye . From Summer 2007, the service has been enhanced with express boats from central London to the O2 Arena (former Millennium Dome ). The Thames Path National Trail runs along the riverside. At the southern end of the Isle of Dogs, the Greenwich foot tunnel provides pedestrian access to Greenwich , across
5300-490: The Thames estuary as inning . The reclaimed land was below high water, protected by earthen banks. These banks if not properly kept up were liable to be breached. This happened in 1448, drowning the land for 40 years. In 1660, the river started to break through the neck of the peninsula, initiating meander cutoff . This was arrested by human intervention, but it left a 5-acre lake called Poplar Gut , which appears on John Rocque 's 1746 Map of London and ten miles around in
5406-579: The UK. Lincoln Plaza was the 2016 winner of the Carbuncle Cup for the year's "worst new building" and The Times described it as "mediocre at best, ugly at worst". The Isle of Dogs is situated some distance downriver from the City of London . It was originally marsh, being several feet below water at high tide. In the Middle Ages it was made available for human habitation by a process known in
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#17327810631035512-406: The acronym CROPT. The physical properties of soils, in order of decreasing importance for ecosystem services such as crop production , are texture , structure , bulk density , porosity , consistency, temperature , colour and resistivity . Soil texture is determined by the relative proportion of the three kinds of soil mineral particles, called soil separates: sand , silt , and clay . At
5618-446: The addition of any more hydronium ions or aluminum hydroxyl cations drives the pH even lower (more acidic) as the soil has been left with no buffering capacity. In areas of extreme rainfall and high temperatures, the clay and humus may be washed out, further reducing the buffering capacity of the soil. In low rainfall areas, unleached calcium pushes pH to 8.5 and with the addition of exchangeable sodium, soils may reach pH 10. Beyond
5724-452: The apparent sterility of tropical soils. Live plant roots also have some CEC, linked to their specific surface area. Anion exchange capacity is the soil's ability to remove anions (such as nitrate , phosphate ) from the soil water solution and sequester those for later exchange as the plant roots release carbonate anions to the soil water solution. Those colloids which have low CEC tend to have some AEC. Amorphous and sesquioxide clays have
5830-552: The area has been dominated by the expanding Canary Wharf development with over 437,000 square metres (4,700,000 sq ft) of office and retail space having been created; 93,000 now work in Canary Wharf alone. The Island achieved notoriety in 1993 when Derek Beackon of the British National Party became a councillor for Millwall ward, in a by-election . This was the culmination of years when race
5936-437: The atmosphere due to increased biological activity at higher temperatures, a positive feedback (amplification). This prediction has, however, been questioned on consideration of more recent knowledge on soil carbon turnover. Soil acts as an engineering medium, a habitat for soil organisms , a recycling system for nutrients and organic wastes , a regulator of water quality , a modifier of atmospheric composition , and
6042-426: The basic cations are forced off the soil colloids by the mass action of hydronium ions from usual or unusual rain acidity against those attached to the colloids. High rainfall rates can then wash the nutrients out, leaving the soil inhabited only by those organisms which are particularly efficient to uptake nutrients in very acid conditions, like in tropical rainforests . Once the colloids are saturated with H 3 O ,
6148-521: The building of the Docklands Light Railway in 1987, the only public transport accessing and exiting the Island consisted of buses using its perimeter roads. These were frequently and substantially delayed by the movement of up to four bridges which allowed ships access to the West India Docks and Millwall Docks. The insular nature of the Island caused its separateness from the rest of London, and its unique nature. During World War II ,
6254-539: The docks were a key target for the German Luftwaffe and were heavily bombed. A number of local civilians were killed in the bombing and extensive destruction was caused on the ground, with many warehouses being destroyed and much of the dock system being put out of action for an extended period. Unexploded bombs from this period continue to be discovered today. Anti-aircraft batteries were based on Mudchute Farm; their concrete bases remain today. After
6360-436: The dry limit for growing plants. During growing season, soil moisture is unaffected by functional groups or specie richness. Available water capacity is the amount of water held in a soil profile available to plants. As water content drops, plants have to work against increasing forces of adhesion and sorptivity to withdraw water. Irrigation scheduling avoids moisture stress by replenishing depleted water before stress
6466-553: The extract reproduced in this article. One road led across the Marshes to an ancient ferry, at Ferry Road. There was rich grazing on the marsh, and cattle were slaughtered in fields known as the Killing Fields , south of Poplar High Street. The western side of the island was known as Marsh Wall , and the district became known as Millwall with the building of the docks, and from the number of windmills constructed along
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#17327810631036572-587: The first use of the term. Importantly, this type of official declaration did not require a formal agreement between the new state and the state it was seceding from. The daring feat of the Isle of Dogs would inspire other independence movements within London. This included the "Free and Independent Republic of Frestonia" in 1977. When squatters inhabiting two streets (Freston Road and Bramley Road) in West London were threatened with eviction, they officially issued
6678-527: The formation, description (morphology), and classification of soils in their natural environment. In engineering terms, soil is included in the broader concept of regolith , which also includes other loose material that lies above the bedrock, as can be found on the Moon and other celestial objects . Soil is a major component of the Earth 's ecosystem . The world's ecosystems are impacted in far-reaching ways by
6784-542: The former dockyard workers and caused serious social deprivation. Ted Johns, a local community campaigner, and his supporters, in protest at the lack of social provision from the state, made a unilateral declaration of independence for the area from the United Kingdom as the Republic of the Isle of Dogs and set up an 'Island Council' with Johns himself as its elected president, and for a single day in 1970 blocked
6890-419: The highest AEC, followed by the iron oxides. Levels of AEC are much lower than for CEC, because of the generally higher rate of positively (versus negatively) charged surfaces on soil colloids, to the exception of variable-charge soils. Phosphates tend to be held at anion exchange sites. Iron and aluminum hydroxide clays are able to exchange their hydroxide anions (OH ) for other anions. The order reflecting
6996-632: The infiltration and movement of air and water, both of which are critical for life existing in soil. Compaction , a common problem with soils, reduces this space, preventing air and water from reaching plant roots and soil organisms. Given sufficient time, an undifferentiated soil will evolve a soil profile that consists of two or more layers, referred to as soil horizons. These differ in one or more properties such as in their texture , structure , density , porosity, consistency, temperature, color, and reactivity . The horizons differ greatly in thickness and generally lack sharp boundaries; their development
7102-415: The island, and with this, just ten days after the barricades first went up, the independence of the Isle of Dogs came to an end. The soil is alluvial and silty in nature, underlaid by clay or mud , with a peat layer in places. The first known written mention of the Isle of Dogs is in the ‘Letters & Papers of Henry VIII ’. In Volume 3: 1519–1523. 2 October 1520. No. 1009 – ‘Shipping’, there
7208-467: The largest ship of that time, the SS Great Eastern designed by Isambard Kingdom Brunel , was launched from the yard of Messrs Scott, Russell & Co, of Millwall. The 211 metres (692 ft) length was too big for the river so the ship had to be launched sideways. Due to the technical difficulties of the launch this was the last big ship to be built on the Island and the industry fell into
7314-596: The lines "The barges wash / Drifting logs / Down Greenwich reach / Past the Isle of Dogs." In modern times the Isle of Dogs has provided locations for many blockbuster films, including the opening scenes of the James Bond film The World Is Not Enough , and more recently Batman Begins , The Constant Gardener , Harry Potter and the Order of the Phoenix , and Love Actually . The Isle of Dogs featured heavily in
7420-610: The marshes." Other sources discount this, believing these stories to all derive from the antiquarian John Strype , and believe it might come from one of the following: Canary Wharf , located in the Isle of Dogs, took its name from sea trade with the Canary Islands , which were named in Latin as Canariae Insulae ("Dog Islands"). The Talbot dog in the coat of arms of the London Borough of Tower Hamlets represents
7526-429: The negatively charged colloids resist being washed downward by water and are out of reach of plant roots, thereby preserving the soil fertility in areas of moderate rainfall and low temperatures. There is a hierarchy in the process of cation exchange on colloids, as cations differ in the strength of adsorption by the colloid and hence their ability to replace one another ( ion exchange ). If present in equal amounts in
7632-412: The negatively-charged soil colloid exchange sites (CEC) that are occupied by base-forming cations is called base saturation . If a soil has a CEC of 20 meq and 5 meq are aluminium and hydronium cations (acid-forming), the remainder of positions on the colloids ( 20 − 5 = 15 meq ) are assumed occupied by base-forming cations, so that the base saturation is 15 ÷ 20 × 100% = 75% (the compliment 25%
7738-419: The next larger scale, soil structures called peds or more commonly soil aggregates are created from the soil separates when iron oxides , carbonates , clay, silica and humus , coat particles and cause them to adhere into larger, relatively stable secondary structures. Soil bulk density , when determined at standardized moisture conditions, is an estimate of soil compaction . Soil porosity consists of
7844-472: The ocean has no more than 10 prokaryotic organisms per milliliter (gram) of seawater. Organic carbon held in soil is eventually returned to the atmosphere through the process of respiration carried out by heterotrophic organisms, but a substantial part is retained in the soil in the form of soil organic matter; tillage usually increases the rate of soil respiration , leading to the depletion of soil organic matter. Since plant roots need oxygen, aeration
7950-534: The original elevated station was demolished. 51°29′13.4″N 00°00′28.5″W / 51.487056°N 0.007917°W / 51.487056; -0.007917 Isle of Dogs The Isle of Dogs is a large peninsula . It is bounded on three sides by a large meander in the River Thames in East London , England, which includes the Cubitt Town , Millwall and Canary Wharf districts. The area
8056-635: The other cations more weakly bound to colloids are pushed into solution as hydrogen ions occupy exchange sites ( protonation ). A low pH may cause the hydrogen of hydroxyl groups to be pulled into solution, leaving charged sites on the colloid available to be occupied by other cations. This ionisation of hydroxy groups on the surface of soil colloids creates what is described as pH-dependent surface charges. Unlike permanent charges developed by isomorphous substitution , pH-dependent charges are variable and increase with increasing pH. Freed cations can be made available to plants but are also prone to be leached from
8162-492: The plant roots release hydrogen ions to the solution. CEC is the amount of exchangeable hydrogen cation (H ) that will combine with 100 grams dry weight of soil and whose measure is one milliequivalents per 100 grams of soil (1 meq/100 g). Hydrogen ions have a single charge and one-thousandth of a gram of hydrogen ions per 100 grams dry soil gives a measure of one milliequivalent of hydrogen ion. Calcium, with an atomic weight 40 times that of hydrogen and with
8268-486: The porous lava, and by these means organic matter and a finer mineral soil accumulate with time. Such initial stages of soil development have been described on volcanoes, inselbergs, and glacial moraines. How soil formation proceeds is influenced by at least five classic factors that are intertwined in the evolution of a soil: parent material, climate, topography (relief), organisms, and time. When reordered to climate, relief, organisms, parent material, and time, they form
8374-414: The processes carried out in the soil, with effects ranging from ozone depletion and global warming to rainforest destruction and water pollution . With respect to Earth's carbon cycle , soil acts as an important carbon reservoir , and it is potentially one of the most reactive to human disturbance and climate change . As the planet warms, it has been predicted that soils will add carbon dioxide to
8480-414: The rate of diffusion of gases into and out of soil. Platy soil structure and soil compaction (low porosity) impede gas flow, and a deficiency of oxygen may encourage anaerobic bacteria to reduce (strip oxygen) from nitrate NO 3 to the gases N 2 , N 2 O, and NO, which are then lost to the atmosphere, thereby depleting the soil of nitrogen, a detrimental process called denitrification . Aerated soil
8586-465: The river to the south and west. The Isle of Dogs was connected to the rest of London by the London and Blackwall Railway , opened in 1840 and progressively extended thereafter. In 1902, the ferry to Greenwich was replaced by the construction of the Greenwich foot tunnel , and Island Gardens park was laid out in 1895, providing views across the river. The London and Blackwall Railway closed in 1926. Until
8692-428: The river. National Cycle Network route 1 runs through the foot tunnel (although cycles must not be ridden in the tunnel itself). The nearest airport is London City Airport , which is 25 minutes away from Canary Wharf by DLR. There is also a helipad situated on the west of the Island and next to Ferguson's Wharf, which is privately run by Vanguard. The presence of docks, some of a considerable size, has enabled
8798-597: The same time, the area was variously known as Isle of Dogs or the Blackwell levels . By 1855, it was incorporated within the parish of Poplar under the aegis of the Poplar Board of Works. This was incorporated into the Metropolitan Borough of Poplar on its formation in 1900. In March 1970, the Isle of Dogs officially issued a Unilateral Declaration of Independence from the UK as the “Republic of
8904-442: The seat of interaction networks playing a decisive role in the stability, dynamics and evolution of soil ecosystems. Biogenic soil volatile organic compounds are exchanged with the aboveground atmosphere, in which they are just 1–2 orders of magnitude lower than those from aboveground vegetation. Humans can get some idea of the soil atmosphere through the well-known 'after-the-rain' scent, when infiltering rainwater flushes out
9010-441: The soil anion exchange capacity. The cation exchange, that takes place between colloids and soil water, buffers (moderates) soil pH, alters soil structure, and purifies percolating water by adsorbing cations of all types, both useful and harmful. The negative or positive charges on colloid particles make them able to hold cations or anions, respectively, to their surfaces. The charges result from four sources. Cations held to
9116-538: The soil by volatilisation (loss to the atmosphere as gases) or leaching. Soil is said to be formed when organic matter has accumulated and colloids are washed downward, leaving deposits of clay, humus , iron oxide , carbonate , and gypsum , producing a distinct layer called the B horizon. This is a somewhat arbitrary definition as mixtures of sand, silt, clay and humus will support biological and agricultural activity before that time. These constituents are moved from one level to another by water and animal activity. As
9222-420: The soil solution composition (attenuate changes in the soil solution) as soils wet up or dry out, as plants take up nutrients, as salts are leached, or as acids or alkalis are added. Plant nutrient availability is affected by soil pH , which is a measure of the hydrogen ion activity in the soil solution. Soil pH is a function of many soil forming factors, and is generally lower (more acidic) where weathering
9328-402: The soil solution. Both living soil organisms (microbes, animals and plant roots) and soil organic matter are of critical importance to this recycling, and thereby to soil formation and soil fertility . Microbial soil enzymes may release nutrients from minerals or organic matter for use by plants and other microorganisms, sequester (incorporate) them into living cells, or cause their loss from
9434-473: The soil voids are saturated with water vapour, at least until the point of maximal hygroscopicity , beyond which a vapour-pressure deficit occurs in the soil pore space. Adequate porosity is necessary, not just to allow the penetration of water, but also to allow gases to diffuse in and out. Movement of gases is by diffusion from high concentrations to lower, the diffusion coefficient decreasing with soil compaction . Oxygen from above atmosphere diffuses in
9540-430: The soil water solution will be insufficient to change the pH, as the acid forming cations stored on the soil colloids will tend to restore the original pH condition as they are pushed off those colloids by the calcium of the added lime. The resistance of soil to change in pH, as a result of the addition of acid or basic material, is a measure of the buffering capacity of a soil and (for a particular soil type) increases as
9646-433: The soil water solution: Al replaces H replaces Ca replaces Mg replaces K same as NH 4 replaces Na If one cation is added in large amounts, it may replace the others by the sheer force of its numbers. This is called law of mass action . This is largely what occurs with the addition of cationic fertilisers ( potash , lime ). As the soil solution becomes more acidic (low pH , meaning an abundance of H ),
9752-462: The soil where it is consumed and levels of carbon dioxide in excess of above atmosphere diffuse out with other gases (including greenhouse gases ) as well as water. Soil texture and structure strongly affect soil porosity and gas diffusion. It is the total pore space ( porosity ) of soil, not the pore size, and the degree of pore interconnection (or conversely pore sealing), together with water content, air turbulence and temperature, that determine
9858-502: The soil, a complex feedback which is exemplified in the dynamics of banded vegetation patterns in semi-arid regions. Soils supply plants with nutrients , most of which are held in place by particles of clay and organic matter ( colloids ) The nutrients may be adsorbed on clay mineral surfaces, bound within clay minerals ( absorbed ), or bound within organic compounds as part of the living organisms or dead soil organic matter. These bound nutrients interact with soil water to buffer
9964-414: The soil, possibly making the soil less fertile. Plants are able to excrete H into the soil through the synthesis of organic acids and by that means, change the pH of the soil near the root and push cations off the colloids, thus making those available to the plant. Cation exchange capacity is the soil's ability to remove cations from the soil water solution and sequester those to be exchanged later as
10070-500: The southern terminus of the DLR 's initial system, and was an elevated terminal station situated to the west of the park. The later construction of the DLR extension to Lewisham involved a tunnel under the Thames, and Island Gardens station was relocated about 100 metres (330 ft) north, close to the northern entrance to the tunnel by Millwall Park . The new station is largely underground;
10176-409: The strength of anion adhesion is as follows: The amount of exchangeable anions is of a magnitude of tenths to a few milliequivalents per 100 g dry soil. As pH rises, there are relatively more hydroxyls, which will displace anions from the colloids and force them into solution and out of storage; hence AEC decreases with increasing pH (alkalinity). Soil reactivity is expressed in terms of pH and
10282-682: The top of the flood defence. In 1802, the West India Docks began to be developed on the Isle of Dogs. Beginning in 1812 the Poplar and Greenwich Ferry Roads Company installed tolls on the East Ferry Road. These proved to be unpopular and after many years of lobbying the Metropolitan Board of Works bought the company and abolished the tolls in 1885. The Docks brought with them many associated industries, such as flour and sugar processing, and also ship building. On 31 January 1858
10388-491: The two concentrations are equal, they are said to neutralise each other. A pH of 9.5 has 10 moles hydronium ions per litre of solution (and also 10 moles per litre OH ). A pH of 3.5 has one million times more hydronium ions per litre than a solution with pH of 9.5 ( 9.5 − 3.5 = 6 or 10 ) and is more acidic. The effect of pH on a soil is to remove from the soil or to make available certain ions. Soils with high acidity tend to have toxic amounts of aluminium and manganese . As
10494-446: The two swing-bridges providing the only access to the area by road. On 10 March, Tower Hamlets Council presented plans for investment and improvement of the island, and with this, just ten days after the barricades first went up, the independence of the Isle of Dogs came to an end. The Isle of Dogs’ short-lived independence came in the wake of Rhodesia’s issuing of a Unilateral Declaration of Independence from Britain in 1965. This marked
10600-473: The void part of the soil volume and is occupied by gases or water. Soil consistency is the ability of soil materials to stick together. Soil temperature and colour are self-defining. Resistivity refers to the resistance to conduction of electric currents and affects the rate of corrosion of metal and concrete structures which are buried in soil. These properties vary through the depth of a soil profile, i.e. through soil horizons . Most of these properties determine
10706-502: The war, the docks underwent a brief resurgence and were even upgraded in 1967. However, with the advent of containerisation , which the docks could not handle, they became obsolete soon afterwards. The docks closed progressively during the 1970s, with the last – the West India and Millwall docks – closing down in 1980. This left the area in a severely dilapidated state, with large areas being derelict and abandoned. The Isle of Dogs' economic problems led to mass unemployment among
10812-553: The water content of the soil, as can be expressed in terms of volume or weight—can be based on in situ probes (e.g., capacitance probes , neutron probes ), or remote sensing methods. Soil moisture measurement is an important factor in determining changes in soil activity. The atmosphere of soil, or soil gas , is very different from the atmosphere above. The consumption of oxygen by microbes and plant roots, and their release of carbon dioxide, decreases oxygen and increases carbon dioxide concentration. Atmospheric CO 2 concentration
10918-461: The weathering of lava flow bedrock, which would produce the purely mineral-based parent material from which the soil texture forms. Soil development would proceed most rapidly from bare rock of recent flows in a warm climate, under heavy and frequent rainfall. Under such conditions, plants (in a first stage nitrogen-fixing lichens and cyanobacteria then epilithic higher plants ) become established very quickly on basaltic lava, even though there
11024-476: The whole soil atmosphere after a drought period, or when soil is excavated, a bulk property attributed in a reductionist manner to particular biochemical compounds such as petrichor or geosmin . Soil particles can be classified by their chemical composition ( mineralogy ) as well as their size. The particle size distribution of a soil, its texture, determines many of the properties of that soil, in particular hydraulic conductivity and water potential , but
11130-558: Was a prominent issue in local politics, especially with regards to allocation of housing. Labour regained the ward in the full council election of May 1994, and held all three seats until a further by-election in September 2004. On 9 February 1996, the IRA detonated a truck bomb near South Quay DLR station on the Isle of Dogs that killed two people and injured more than a hundred others. There are four state primary schools located on
11236-496: Was historically part of the Manor, Hamlet, Parish and, for a time, the wider borough of Poplar . The name had no official status until the 1987 creation of the Isle of Dogs Neighbourhood by Tower Hamlets London Borough Council . It has been known locally as simply "the Island" since the 19th century. The whole area was once known as Stepney Marsh ; Anton van den Wyngaerde 's "Panorama of London" dated 1543 depicts and refers to
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