2010-12-08_PERMIT FILE - C1981008A (18)

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Specific criteria Prinw farmlands n all the following criteria: Terms used in this section are defined in USDA publications "Soil Taxoncxrry, Agriculture Handbook 436 "; "Soil Survey hkinual, Agriculture Handbook 18 "; "Rainfall - Erosion Losses from Cropland, Agriculture Handbook 282 "; "Wind Erosion Forces in the United States and Their Use in Predicting Soil Loss, Agriculture Handbook 346" and "Saline and Alkali Soils, Agriculture Handbook 60." 1. The soils have: a. Aquic, odic, LlStic, or xeric rmisture regimes and sufficient available water capacity within a depth of 40 inches (1 meter), or in the root zone ( root zone is the part of the soil that is penetrated or can be penetrated by plant roots) if the root zone is less than 40 inches deep, to produce the oomrrordy grown cultivated crops (cultivated crops include, but are not limited to, grain, forage, fiber, oilseed, sugar beets, sugarcane, vegetables, tobacco, orchard, vineyard, am k:Yish fruit crops) adapted to the region in 7 or pore years out of 10: or b. Xeric or ustic moisture regimes in which the available water capacity is limited, but the area has a developed irrigation water supply that is dependable (a dependable water supply is one in which enough water is available for irrigation in 8 out of 10 years for the crops ecmrronly grown) and of adequate quality; or, ( the tern adequate supply of water a_s used in the text of this report is synonymous with dependable water supply), ' 3 �1 C. Aridic or torric moisture regimes and the area has a developed irrigation water supply that is dependable and of adequate quality; and, 2 The soils have a temperature regime that is frigid, mesic, therrrric, or hyperthermic (pergelic and cryic regimes are excluded). These are soils that, at a depth of 20 inches (50 cm) , have a rman annual temperature higher than 32 °F (0 0 C). In addition, the mean s.Lrvner temperature at this depth in soils with an 0 horizon is higher than 47 °F (8 °C); in Soils that have no 0 lyorizon, the mean summer temperature is higher than 59 °F (15 °C); and, 3. The soils have a pH between 4.5 and 8.4 in all horizons within a depth of 40 inches (1 mete.) or in the root zone if the root zone is less than 40 inches deep: j:.n:i 4. The soils either hava no water table or have a water table that is maintained at a sufficient depth during the cropping season to allow cultivated crops oorarmn to the area to be grown; and, S. The soils can be rrvanaged so that, in all horizons within a depth of 40 inches (1 meter) or in the root zone if the root zone is less than 40 inches deep, during part of eadi year the conductivity of the saturation extract is less than 4 mmhos /con and the exchangeable sc>dium percentage (ESP) is less than .15; and, • Revised September 2010 (PR06) Attachment 2.04.9 -5 -7