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f <br />{ <br /> Jacktone clay - slow permeability <br /> Madera sandy loam -very slow permeability <br /> i x ry p y <br /> FL Manteca fine sandy loam - moderate permeability <br /> Stockton clay - slow permeability <br /> FAgricultural wastes can be applied to soils that have only slight limitations because of <br /> : permeability. Agricultural wastes applied-to soils that have permeability of less than 0.2 inch per <br /> hour should be incorporated (solids) or injected (liquids) into the soil to reduce potential surface <br /> water contamination from erosion and runoff. Split rate applications of liquid wastes applied to <br /> soils that have permeability of more than 2 inches per hour reduce the potential for contamination <br /> of shallow aquifers. Reducing therate of application and using split applications of waste solids <br /> on soils that have severe limitations for this use can reduce the potential for contamination of <br /> shallow aquifers. <br /> Soil i„PH: <br /> k <br /> a <br /> Soil pH affects plant nutrient availability, agricultural waste decomposition rates, and adsorption of <br /> heavy metals. Soils in which the surface pH is less than 6.5 have lower potential for plant growth <br /> and low heavy metal adsorption. <br /> Based on the "Agricultural Waste Management Handbook" the limitations are classified as follows: <br /> Site conditions of pH > 6.5 are considered to have slight limitations. <br /> Site conditions of pH between 3.5 - 6.5 are considered to have moderate limitations. <br /> Site conditions of pH < 3.5 are considered to have severe limitations. <br /> Based upon NRCS data ("Physical and Chemical Properties of the Soils" = Table 18), i <br /> Jacktone, Manteca, and Stockton soils have a pH higher than 6.5 and the limitations are <br /> slight and Madera soils have pH between 5.6 and 8.6 and the limitations are moderate to <br /> .' slight. <br /> Twenty one (21) soil samples were collected and their pH was measured,_ The pH value in <br /> F#� the soil samples were between 7.6 and 8.4; therefore, the limitations can be considered <br /> "slight". <br /> ' Continuous, high a lication rates of agricultural g pp g cultural wastes reduce soil pH. if large amounts of . <br /> agricultural wastes are applied to small fields or land tracts, the soil pH should be monitored to <br /> prevent its reduction to levels that affect soil fatings and limitations for plant growth. C <br /> Ponding <br /> Ponding is standing water in a closed depression that is removed only by percolation, <br /> transpiration, or evaporation. Agricultural wastes applied to soils that are ponded have a very high <br /> Refer to page 22 for Endnotes and Reference Sources <br /> k <br /> ®Western Dairy Design Associates, Inc.2003 <br /> Page 15 <br /> N <br />