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Hemists – Histosols that are primarily made up of moderately decomposed organic materials. Saprists – Histosols that are primarily made up of highly decomposed organic materials, often called muck. Wassists - Histosols that have a field observable water table 2 cm or more above the soil surface for more than 21 hours of each day in all years.
A soil conditioner is a product which is added to soil to improve the soil’s physical qualities, usually its fertility (ability to provide nutrition for plants) ...
The soil is very light, so windbreaks are necessary to protect these fields in dry weather. It also can catch fire and burn underground for months. Oxidation also removes a portion of the soil each year, making it progressively shallower.
Histels: organic soils similar to histosols except that they have permafrost within two meters (6 ft 7 in) below ground surface. They have 80% or more organic materials from the soil surface to a depth of 50 cm (20 in) or to a glacic layer or densic, lithic, or paralithic contact, whichever is shallowest.
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Soils are the product of climate, organisms and topography, acting on parent (geologic) material over time. Thus the great diversity of geologic materials, geomorphic processes, climatic conditions, biotic assemblages and land surface ages in the United States is responsible for the presence of an enormous variety of mineral and organic soils.
SahysMod - Saline seep - Salinity in Australia - Salt marsh - Salting the earth - SaltMod - San Joaquin (soil) - Sand - Sand boil - Sandbag - Scobey (soil) - Seitz (soil) - Serpentine soil - Shear strength (soil) - Shear strength test - Shrub swamp - Silt - Slope stability - Slump - Sodium adsorption ratio - Soil - Soil acidification - Soil amendment - Soil and water assessment tool - Soil ...
About 1,000 soil subgroups are defined in the United States. [6] A soil family category is a group of soils within a subgroup and describes the physical and chemical properties which affect the response of soil to agricultural management and engineering applications. The principal characteristics used to differentiate soil families include ...