PERMFILE102095

• Permit No: C1981028
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: APPENDIX L SOILS & VEGETATION
• Media Type: D
• Archive: No

9
This, combined with the slightly higher silt and
clay content of the Osgood soils suggest that they
would be slightly more resistant to wind erosion,
have a slightly higher water holding capacity and
thus should provide a better medium for plant growth
and be more stable. An inch of water would pene-
trate about 18 inches into the sand surface soils
when initially dry (calculations made from soils
laboratory data, appendix B). This calculated depth
of water penetration is in agreement with a field
observation made on 24 October when it was found
that water had penetrated the sand to 28 inches
after 1.9 inches of precipitation on 21-23 October.
3. Plant available P levels are sufficient in the
surface horizons but decline rapidly with depth.
Alteration of the surface soil during the typical
redistribution process may result in mixing of
existing topsoil and subsoil materials and could
result in lower available P levels. Thus, compos-
ite surface soil samples should be obtained follow-
ing topsoil redistribution to determine the P status
of the soil at that time.
4. Organic matter levels are highest in the surface
~ layers and decrease rapidly with depth.
5. Available R levels appear to be adequate in all
horizons of all soils except for the C horizon of
one of the Valent soil profiles and the Cca horizon
of one of the Osgood soil samples.
6. Critical levels for zinc, iron, copper, and mangan-
ese relative to deficiencies of these elements on
native range are not well known. In general, the
available levels of these elements in the surface
soils are adequate for most agronomic crops, thus
it is assumed that they are adequate for most
species that would be grown in the area. Avail-
able iron is considered adequate throughout the
entire profile in all soils investigated. In
general, the same is true for copper and manganese.
Available zinc, on the other hand, is low except
for the surface layers. However, it must be
remembered that the low rating is based on the zinc
status for agronomic crops. Perhaps zinc should be
considered suspect but not limiting in all materials
with zinc levels below 0.5 ppm.