2010-09-22_REVISION - C1981008 (7)

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Specific criteria Prime farmlands meet all the following criteria: Teens used in this section are defined in USDA publications: "Soil Taxonomy, Agriculture Handbook 436 "; "Soil Survey Manual, Agriculture Handbook 18 "; "Rainfall- Erosion Lasses from Cropland, Agriculture Handbook 282 "; "Wind Erosion Forces in the United States and Their Use in Predicting Soil Lis, Agriculture Handbook 346" and "Saline and Alkali Soils, Agriculture Handbook 60." 1. The soils have: a. Aquic, odic, ustic, or xeric moisture 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 ecanonly grown cultivated crops (cultivated crops include, but are not limited to, grain, forage, fiber, oilseed, sugar beets, sugarcane, vegetables, tobacco, orchard, vineyard, and tush fruit crops) adapted to the region in 7 or more 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 cut of 10 years for the crops ecmmronly groan) and of adequate quality; or, (the term adequate supply of water as used in the text of this report is synonymous with dependable water supply). ' 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, thermic, or hyperthermmic (pergelic and cryic regimes are excluded). These are soils that, at a depth of 20 inches (50 cm), have a mean annual temperature higher than 32 °F (0 °C). In addition, the mean summoner temperature at this depth in soils with an 0 horizon is higher than 47 ° F (8 ° C); in soils that hove no 0 horizon, the mean summer temperature is higher than 59 °F (15 0 C); and, 3. The soils have a pH between 4,5 and 8.4 in all horizons within a depth of 40 inches (1 metez:) or in the root zone if the root zone is less than 40 inches deep,I and 4. The soils either have no water table or have a water table that is maintained at a sufficient depth during the cropping season to allow cultivated crops common to the area to be grown; and, S. The soils can be managed 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 each year the conductivity of the saturation extract is less than 4 mmhos /cm and the exchangeable sodium percentage (ESP) is less than 15; and, a Attachment 2.04.9 -5 -7