Soil with a pH value higher than 7. 3 is normally referred to as alkaline.

Clay identification is determined by a process of refiring the ceramic, and assigning a color to it using Munsell Soil Color notation.

Soil erosion ( especially from agricultural activity ) is considered to be the leading global cause of diffuse water pollution, due to the effects of the excess sediments flowing into the world's waterways.

The most commonly used model for predicting soil loss from water erosion is the Universal Soil Loss Equation ( USLE ), which estimates the average annual soil loss as:

Soil is contaminated through particulate accumulation from lead in pipes, lead paint and residual emissions from leaded gasoline that was used before the Environment Protection Agency issue the regulation around 1980.

Environment-current issues: Soil salinity is rising.

According to the Soil Association, the total copper that can be applied to organic land is 6 kg / ha / year.

Soil erosion due to improper land and plough utilization is possible.

Its label states it is approved by the Soil Association and the Vegetarian Society.

Soil is a natural body consisting of layers ( soil horizons ) that are primarily composed of minerals which differ from their parent materials in their texture, structure, consistency, colour, chemical, biological and other characteristics.

Soil is the end product of the influence of the climate ( temperature, precipitation ), relief ( slope ), organisms ( flora and fauna ), parent materials ( original minerals ), temperature, and time.

Soil is composed of particles of broken rock ( parent materials ) which have been altered by chemical and mechanical processes that include weathering ( disintegration ) with associated erosion ( movement ).

Soil is altered from its parent material by the interactions between the lithosphere, hydrosphere, atmosphere, and biosphere.

Soil is commonly referred to as " earth " or " dirt "; technically, the term " dirt " should be restricted to displaced soil.

Soil pH, a measure of the hydrogen ion ( acid-forming ) soil reactivity, is a function of the soil materials, precipitation level, and plant root behavior.

Soil formation, or pedogenesis, is the combined effect of physical, chemical, biological, and anthropogenic processes on soil parent material.

Soil is said to be formed when organic matter has accumulated, and colloids washed downward, leaving deposits of clay, humus, iron oxide, carbonate, and gypsum.

Soil is said to be formed when detectable layers of clays, organic colloids, carbonates, or soluble salts have been moved downward.

Soil is always changing.

Soil texture is determined by the relative proportion of the three kinds of soil particles, called soil " separates ": sand, silt, and clay.

Soil density, particularly bulk density, is a measure of soil compaction.

** Soil erosion – process by which soil is removed from the Earth's surface by natural processes such as wind or water flow, and then transported and deposited in other locations.

Soil is not only a support for vegetation, but it is also the zone beneath our feet ( the pedosphere ) of numerous interactions between climate ( water, air, temperature ), soil life ( micro-organisms, plants, animals ) and its residues, the mineral material of the original and added rock, and its position in the landscape.

When the House reconvened, the party schism caused by the Free Soil Party precluded the formation of a majority needed to elect a Speaker.

Soil biology and chemistry can be seriously damaged by acid rain.

Soil chemistry can be dramatically changed when base cations, such as calcium and magnesium, are leached by acid rain thereby affecting sensitive species, such as sugar maple ( Acer saccharum ).

Soil disturbance like tilling increase decomposition by increasing the amount of oxygen in the soil and by exposing new organic matter to soil microbes.

Soil moisture can be measured in various ways ; by capacitance probe, time domain reflectometer or Tensiometer.

Forcing Slavery Down the Throat of a FreesoilerAn 1854 cartoon depicts a giant Free Soil Party | free soiler being held down by James Buchanan and Lewis Cass standing on the Democratic Party ( United States ) | Democratic platform marked " Kansas ", " Cuba " and " Central America " ( referring to accusations that southerners wanted to annex areas in Latin America to expand slavery ).

Soil fertility can sometimes be mitigated by applying the appropriate lime and organic fertilizers.

During the crop year 2008, many of the certified organic potatoes produced in the United Kingdom and certified by the Soil Association as organic were sprayed with a copper pesticide to control potato blight ( Phytophthora infestans ).

* Soil contamination occurs when chemicals are released by spill or underground leakage.

Soil porosity consists of the part of the soil volume occupied by air and water.

Soil type s by clay, silt and sand composition as used by the United States Department of Agriculture | USDAIron-rich soil near Paint Pots in Kootenay National Park, Canada The mineral components of soil, sand, silt, and clay determine a soil's texture.

An early and prominent example of this was The Political Economy of Soil Erosion in Developing Countries by Piers Blaikie in 1985, which traced land degradation in Africa to colonial policies of land appropriation, rather than over-exploitation by African farmers.

* Soil salinity control by subsurface drainage

" The Calhoun Doctrine was vehemently opposed by the Free Soil forces, who merged into the new republican Party around 1854.

Soil contamination is sometimes related to such surface runoff, but more importantly is associated with soil contamination from underground fuel tanks or auto servicing operations which commonly are ancillary uses of car wash sites — but not an issue for car washing itself.

In the presidential election in 1848, the Democratic Party split over the slavery issue, with the abolitionists leaving the party and forming the Free Soil Party, and making Martin Van Buren their nominee.

Soil contains 5 – 770 ppm of zinc with an average of 64 ppm.

Soil forms a structure filled with pore spaces and can be thought of as a mixture of solids, water, and air ( gas ).

Soil building and pest population management benefits can be further utilized with different complexities of crop rotation.

The " Free Soil " Party of 1848 – 52 and the new Republican Party after 1854 demanded that the new lands opening up in the west be made available to independent farmers, rather than wealthy planters who would develop it with slaves, and force yeomen farmers onto marginal lands.

Soil retrogression and degradation are two regressive evolution processes associated with the loss of equilibrium of a stable soil.

Soil scientists have raised concerns about how to preserve soil and arable land in a world with a growing population, possible future water crisis, increasing per capita food consumption, and land degradation.

* List of Universities with Soil Science Curriculum

Soil salinity can be reduced by leaching soluble salts out of soil with excess irrigation water.

Soil salinity control involves watertable control and flushing in combination with tile drainage or another form of subsurface drainage.

The main environmental and agricultural body is the Nassau County Soil and Water Conservation District, which works closely with other area agencies.

The main environmental and agricultural body is the St. Johns County Soil and Water Conservation District, which works closely with other area agencies.

# Soil surface: cover crops to retain soil and lessen erosion, along with green manures to add nutrients and organic matter to the soil, especially nitrogen

* Soil: fertile with rich nutrients and minerals

* Soil: Alluvial and volcanic soils are suitable, with a sloping surface well-suited for best yields.

Free Soil previously operated a two-building K-12 school district, with the high school closing in 2007 and elementary closing in 2010.

Burton D. Hurd, whose company promoted suburban garden farms with " Soil Richer Than the Valley of the River Nile " to prospective settlers, platted the townsite in 1911 and by 1914, the town had a gristmill, sawmill, cotton gin, hotel, and several general stores.

The Surface of this Township is generally level the dry land is but very little elevated above the Swamps the Soil is poor 3rd rate bearing but little vegetation but is generally covered with a thick heavy moss.

The Surface of the Township is generally broken the Soil is very poor 3rd rate producing very little vegetation but the Surface of the land is generally covered with a thick heavy moss.

The Surface of this Township is generally Broken Soil 3rd rate producing but little vegetation the Surface of the land being generally covered with a thick heavy moss (?).

Soil resistivity measurements combined with soil analysis make it possible to precisely map agro-pedological conditions.