Soil type, drainage, or degree of slope can make the difference between good crops and poor ones.

Soil conditions for farming are generally good, especially downwind of volcanoes.

Soil 1st & 2nd Rate and of good quality for agricultural purposes.

Soil Fair 2nd Rate and good for agricultural purposes.

Soil and especially clay is good thermal mass ; it is very good at keeping temperatures at a constant level.

Soil is good for farming and cattle rising.

* Soil is kept moist but well-drained and aerobic, with good structure and enough organic matter to support increased biological activity.

Soil redeposition is evaluated by washing clean swatches with the dirty ones.

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.

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 containing high levels of organic materials are often more resistant to erosion, because the organic materials coagulate soil colloids and create a stronger, more stable soil structure.

Soil compaction also affects the permeability of the soil to water, and hence the amount of water that flows away as runoff.

Soil colloidal particles ( clay and humus ) behave as a repository of nutrients and moisture, and buffer the variations of soil solution ions.

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.

Soil texture affects soil behaviour, in particular its retention capacity for nutrients and water.

Soil components larger than 2. 0 mm are classed as rock and gravel and are removed before determining the percentages of the remaining components and the texture class of the soil, but are included in the name.

Soil steam sterilization involves injecting steam into contaminated soil in order to kill subterranean plant parts.

* Unified Soil Classification System, a soil classification system used in engineering and geology

Soil Erosion and Cill prevent the disruption and detachment of soil aggregates that cause macrospores to block, infiltration to decline, and runoff to increase.

Ribosomal RNA gene sequencing of soil suggests that there may be a fourth subphylum of Ascomycota ( termed Soil Clone Group I or SCGI ), that has not been described in cultures or based on fruiting bodies.