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4 k! Soils' Profile: Soil types at George teVelde Dairy facility and farm area;referenced from the Soil Survey of San Joaquin County, soil panel#27, Escalon Quadrangle;reference appendix IV-A: Soil type#193: This soil is not located at the dairy site. It is at the adjacent property to be used to disperse manure solids and nutrient liquids onto. Name:Marera sandy loam,0 to 2%slopes. This moderately well drained,nearly level soil is on low terraces. It is moderately deep to a hardpan. Typically,the surface layer is grayish brown and brown sandy loam about 19 inches thick. The upper 4 inches of the subsoil is brown sandy clay loam.The next 6 inches is a claypan of light reddish brown clay. The lower part to a depth of 60 inches is a pale brown and brown,indurated, iron-and silica-cemented A hardpan. In some areas the surface layer is fine sandy loam or loam. Includes in this unit are small areas of Alamo soils in drainways,Exeter and Jahant soils in landscape areas.Also included are small areas of Madera soils that have slopes of 2 to 5 percent and areas where depth to the hardpan is as little as 10 inches and most of the soil has been removed,altered,or exposed as a result of deep leveling cuts.Included areas make up about 15 percent of the total acreage. Permeability is very slow in the Madera soil.Available water capacity is low.The shrink-swell potential is high.The effective rooting depth is limited by the hardpan at a depth of 20 to 40 inches. Roots are restricted to cracks and the faces of peds in the claypan,which is at a depth of 10 to 25 inches. Water is briefly perched above the claypan and hardpan after periods of heavy rainfall or irrigation. Runoff is ponded.The hazard of water erosion is slight.The rate of water intake in irrigated areas is 1.5 inches per hour. The main limitations are the complex slopes and the low available water capacity.Because the soil is droughty,applications of irrigation water should be light and frequent.A tillage pan forms easily if the } soil is tilled when wet.Returning crop residue to the soil or regularly adding other organic material improves fertility,minimizes crusting,and maintains the rate of water intake. Soil type#219:This soil not located at the dairy site. It is a small portion of the north east corner of the north east 1/4 section of Town ship 1S,Range 9E,section 10. Name: Redding loam,0 to 3%slopes. This moderately well drained,nearly level and gently sloping soil is on high terraces. It is moderately deep to a hardpan. Slopes are complex,and the landscape is characterized by hymmocky microrelief. Typically,the upper part of the surface layer is light brown loam about 6 inches thick. The lower part is yellowish red loam about 21 inches thick.The upper par of the subsoil is a claypan of yellowish red clay about 3 inches thick. The lower par to a depth of 60 inches is a reddish yellow, indurated silica-cemented hardpan. In some areas the surface layer is gravely or cobbly loam. Includes in this unit are areas of Yellowlark soils in drainageways and shallow,medium textured soils that have a claypan at a depth of 10 to 15 inches. Permeability is very slow in the Redding soil. Available water capacity is low.The shrink-swell potential is high. The effective rooting depth is limited by the hardpan at a depth of 20 to 40 inches. Roots are restricted to cracks and the faces of pods in the claypan,which is at a depth of 20 to 36 inches. Water is briefly perched above the claypan after periods of heavy rainfall or irrigation.Runoff generally is very slow.The hazard of water erosion is slight. The rate of water intake in irrigated areas is 1.0 inch per hour. Soil type#237: This is the majority of the soil of the facility. Name: San Joaquin sandy loam,2 to 5%slopes. Moderately well drained,undulating soil is on dissected terraces.It is moderately deep to a hardpan. The surface layer is brown sandy loam about 10 inches thick. The upper part of the subsoi I is a clay pan of brown clay about 10 inches thick.. The lower part to a depth of 60 inches is a brown and light brown, f insurated hardpan. In some areas the surface layer is fine sandy loam. Permeability is very slow in the San Joaquin soil.Available water capacity is very low.The shrink- swell potential is high.The effective rooting depth is limited by the hardpan at a depth to 20 to 40 inches. Roots are restricted to cracks and the faces of pens tin the claypan,which is at a depth of 10 to 20 inches. Water is briefly perched above the claypan and hardpan after periods of heavy rainfall or irrigation. Runoff is slaw or medium,and the hazard of water erosion is slight or moderate. The rate of water intake in irrigated areas is 1.5 inches per hour. ®Western Design/David Avila 1999 6 r F