- 업종: Earth science
- Number of terms: 26251
- Number of blossaries: 0
- Company Profile:
An international scientific society that fosters the transfer of knowledge and practices to sustain global soils. Based in Madison, WI, and founded in 1936, SSSA is the professional home for 6,000+ members dedicated to advancing the field of soil science. It provides information about soils in ...
A saturated, permeable geologic unit of sediment or rock that can transmit significant quantities of water under hydraulic gradients.
Industry:Earth science
(i) A taxonomic class at the subgroup level of soil taxonomy having properties that are not characteristic of any class in a higher category (any order, suborder or great group) and that do not indicate transition to any other known kind of soil. (ii) A soil that is a member of one such subgroup.
Industry:Earth science
(i) Of or pertaining to the soil. (ii) Resulting from or influenced by factors inherent in the soil or other substrate, rather than by climatic factors.
Industry:Earth science
A soil matrix which has a low chroma in situ, but undergoes a change in hue or chroma within 30 minutes after the soil material is exposed to air. The color change is due to the oxidation of iron.
Industry:Earth science
A generally firm organic layer on the surface of mineral soils. It consists of fallen plant material that is in the process of decomposition and includes everything from the litter on the surface to underlying pure humus. Duff is an organic soil material which is also one of the USDA textures of muck (sapric soil material), mucky peat (hemic soil material), or peat (fibric soil material).
Industry:Earth science
A potassium feldspar identical in composition to orthoclase but differing in internal structure. KAlSi3O8.
Industry:Earth science
A penetrometer which is driven into the soil by a hammer or falling weight.
Industry:Earth science
A natural, residual concentration of wind-polished, closely packed pebbles, boulders, and other rock fragments, mantling a desert surface where wind action and sheetwash have removed all smaller particles. It usually protects the underlying, finer-grained material from further deflation.
Industry:Earth science
(i) Generically refers to local, slight irregularities in form and height of a land surface that are superimposed upon a larger landform, including such features as low mounds, swales, and shallow pits. (ii ) Slight variations in the height of a land surface that are too small to delineate on a topographic or soils map at commonly used map scales (e.g. 1:24 000 and 1:15 840).
Industry:Earth science
