1988-04-29_PERMIT FILE - C1981008A ‎(49)‎

• Permit No: C1981008A
• IBM Index Class Name: PERMIT FILE
• Doc Date: 4/29/1988
• Doc Name: APPENDIX
• Section_Exhibit Name: Tab 9 Appendix C
• Media Type: D
• Archive: Yes

48b
Mapping Unit A kind of soil, a combination of kinds of soil, or
land types that can be shown at the scale of mapping
for the defined purposes and objectives of the
survey. Mapping units are generally designed to
reflect significant differences in use and management.
Mollic Epipedon Generally, a surface horizon of mineral soil that
is dark colored and relatively thick, contains
at least 0.580 organic carbon and is not massive
and hard when dry.
Ochric Epipedon Generally, a light-colored surface horizon low
in organic matter which includes the eluvial
layers near the surface, and is often hard and
massive when dry.
Paralithic A boundary between soil and coherent underlying
contact material. The underlying material is normally a
partially consolidated sedimentary rock such as
sandstone, siltstone, loamstone, shale or marl.
Its consolidation is such that roots cannot enter,
but the material can be hand dug with a spade when
moist.
Sand Individual rock or mineral fragments in soils having
diameters ranging from 0.05 to 2.0 millimeters. As
a soil texture class, any soil that contains 85
percent or more sand and not more than 10 percent
clay.
Silt Individual mineral particles in a soil that range
in diameter from the upper limit of clay (0.002 mm)
to the lower limit of very fine sand (0.05 mm) .
Soil of the silt textural class is 80 percent or
more silt and has less than 12 percent clay.
Soil The unconsolidated mineral and organic material on
the immediate surface of the earth that serves as
a natural medium for the growth of land plants and
that has been subjected to and influenced by genetic
and environmental factors.
Soil Color Standard soil color notations based on the Munsell
color system. (Example, 10 YR 3/2 = very dark grayish
brown) .
Soil Depth The depth of soil material that plant roots can
penetrate readily to obtain water and plant nutrients.
Soil Drainage The frequency and duration of periods when the soil
is free of saturation or partial saturation.
Soil Forming Time, relief, organisms, climate, and parent material.
Factors
Soil Horizon A layer of soil approximately parallel to the soil
surface with characteristics produced by soil forming
processes. Collectively , soil horizons form the soil
profile.