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T <br /> potential for contaminating the ponded surface water. Application on these soils should be <br />+ avoided if possible. <br /> r � <br /> There are no closed depressions at the subject site. <br /> A <br /> Salinit <br /> ! ` Salinity is the concentration of dissolved salts in the soil solution and is related to, electric <br /> , <br /> conductivity.. Electric <br /> Y al conductivity is the standard measure of soil salinity and i <br /> r y s recorded as <br /> mmhoslcm. High soil salinity interferes with the ability of the plant to absorb water from the soil <br /> and to exchange plant nutrients. This interference reduces plant growth and seed germination <br /> and limits the choice of crops that can be successfully grown. If soil salinity is a potential hazard <br /> or limitation, crops that have a high tolerance to salinity should be used in the agricultural waste <br /> management system. <br /> Based on criteria from the NRCS "Agricultural Waste Management Field Handbook" <br /> �j <br /> r <br /> f . Site conditions of mmhoslcm < 4 are considered to have very slight limitations <br /> Site conditions of between 4 - 8 mmhoslcm are considered to have slight limitations <br /> F Site conditions of between 8 - 16 mmhoslcm are considered to have <br /> Site conditions of mmhoslcm X16 are considered to have severe limitations ate limitations <br /> Based upon NRCS data ("Physical and Chemical Properties of the Soils" - Table 18), the <br /> soils have mmhoslcm<4; therefore, the limitations are "very slight". <br /> TwentyI <br /> one (21) soil samples were collected and analyzed for salinity. The salinity values j <br /> measured were between 0.2 and 1.9 mmhoslcm; therefore, the site can be considered to <br /> have "very slight limitations". <br /> slop � <br /> Slope is the inclination of the soil surface from the horizontal expressed as a percentage. The <br /> slope influences runoff velocity, erosion, and the ease with which machinery can be used. Steep <br /> slopes limit application methods and rates and machinery choices. Runoff velocity, soil carryin <br /> capacity of runoff, and potential water erosion increase as slopes become steeper. Limitations for <br /> f the application of agricultural wastes are slight iif the slope is less than 8 percent, moderate if it is <br /> 8 to 15 percent, and severe if it is more than 15 percent. Agricultural g wastes applied to soils that I <br /> have moderate limitations should be incorporated. This minimizes erosion and transport of waste <br /> r materials by runoff, thus reducing the potential for surface water contamination. l <br /> Soils that have severe slope limitations have limited cropping potential and are <br /> subject to excessive runoff and erosion. Agricultural wastes should be <br /> incorporated into these soils as soon as possible to reduce the potential for- <br /> surface water contamination. Conservation practices that reduce potential water <br /> Fi erosion and runoff help prevent the erosion and transport of agricultural <br /> Refer to page 22 for Endnotes and Reference Sources <br /> m Western Dairy Design Associates,Inc.2003 <br /> F, <br /> Page 16 <br />