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'n Limitations for agricultural waste application are slight if stoniness is class 1 (less than 0.1 percent of the surface covered with stones and boulders), moderate if it is class 2 (0.1 to 3.0 percent of the j surface covered with stones and boulders), and severe if it is classes 3, 4, 5, or 6 (more than 3 percent of the soil surface is covered with stones and boulders). Rock fragments, stones, and boulders can restrict application equipment operations and trafficability and affect the incorporation of agricultural wastes. Based upon NRCS "Engineering Index Properties Table 17, there are no fragments greater --{ than 3 inches (0%)-in the site soils. Intake Rate Ell The intake rate is the rate at which water enters the soil surface. Initial water intake is influenced by soil porosity, bulk density, moisture content, texture, structure, and permeability of the surface layer. Continued water intake rate is controlled by the permeability of underlying layers. Water . intake potential is inferred from hydrologic soil groups and inversely related to the hydrologic group runoff potential. If agricultural liquid and solid manure that have large quantities of suspended solids are applied at high rates-on soils that have high or moderate intake potential, sail macropore space can clog and the soil intake rate is reduced. Conversely, arrl«t1en and incorporation of liquid and solid manure to soils that have slow water intake potential can increase soil structure and porosity, thus improving the potential water intake rate. The short-term effect may be pore clogging and resulting runoff if application rates are high on soils that intake rate. 9 have a slow i t Soils are classified in four groups (A, B, C, and D). Type ype A soils have high infiltration rates even when thoroughly wetted, type B soils have moderate infiltration rates when thoroughly wetted, type C soils have slow infiltration rates when thoroughly wetted, and type D soils have slow infiltration rates and consist mainly of clay soils with high swelling potential or an impervious layer near the j surface. R ' According to the MRCS "Water Features" Table 19, Manteca soils are type C and Jacktone, I Madera, and Stockton soils are type D. Permeability rate, inches per hour (five foot): Permeability (hydraulic conductivity) is the quality of soil that enables water to move downward through the soil profile. It generally is inferred from the permeability of the most slowly permeable horizons in the profile_ Permeability is estimated from soil physical properties and is expressed in F,' inches per hour. M Permeability rates affect runoff, leaching, and decomposition rates of agricultural wastes that are applied to or incorporated in the surface layer. Application and incorporation of agricultural wastes improve soil surface intake and permeability; however, frequent applications at high rates can clog S soil pores and reduce soil surface permeability and intake. Refer to page 22 for Endnotes and Reference Sources Western Dairy Design Associates, Inc.2003 l:. Page 14 I