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Included in this unit are small areas of Bruella, Tokay, and Veritas soils on the slightly higher parts of the landscape. Also included are small areas of San Joaquin soils in landscape positions. Included areas make up about 15%of the total acreage. Permeability is very slow in the Jahant soil. Available water capacity is moderate. The shrink-swell potential is high. The effective rooting depth is limited by the hardpan at a depth of 40 to 60 inches. Roots — are limited to cracks and the faces of peds in the claypan.which is a at a depth of 22 to 31 inches. Water may be briefly perched above the hardpan after periods of heavy rainfall or irrigation. Runoff is slow, and the hazard of water erosion is slight. The rate of water intake in irrigated auras is 1.0 inches per hour. _ The hardpan limits the suitability for deep-rooted plants. Where feasible,deep ripping of this restrictive layer can help to overcome this limitation. A tillage pan forms easily if the soil is tilled when wet. Chiseling or subsoiling breaks up the pan. Furrow,border, and sprinkler irrigation systems are suitable. Returning crop residue to the soil or regularly adding other organic material improves fertility, minimizes crusting,and increases the rate of water intake. This map unit is in capability units IIIs-3, irrigated, and IVs-3, non-irrigated It is in vegetative soil group D. Approximate coverage of farmed properties: R erence aerial soils map; appendix IIIF Location: Soil type: #195 #193 #182 #236 #237 Dairy Site- 60% 20% 15% 4% 1% Future Site- 20% 74% 0% 0% 6% Land Capability Classification': Land capability classification shows, in a general way, the suitability of soils for most kinds of field crops. The criteria used in grouping the soils do not include major and general expensive landforming that would change slope, depth or other characteristics of the soils, nor do they include possible but unlikely major reclamation projects. In the capability system, soils are generally grouped at three levels: capability class, subclass, and unit. These levels are defined as follows: • Capability classes, the broadest groups, are designated by Roman numerals I through VIII. The numerals indicate progressively greater limitations and narrower choices for practical use. The classes are defined as follows: • Class I soils have few limitations that restrict their use. • Class II soils have moderate limitations that reduce the choice of plants or that require moderate conservation practices. • Class III soils have severe limitations that reduce the choice of plants or that require special conservation practices, or both. • Class IV soils have very severe limitations that reduce the choice of plants or that require very careful management,or both- 0 oth• Class V soils are not likely to erode but nave other limitations, impractical to remove, that limit their use. • Class VI soils have severe limitations that make them generally unsuitable for cultivation. _ 0 Class VII soils have very severe limitations that make them unsuitable for cultivation. • Class VIII soils and miscellaneous areas have limitations that nearly preclude their use for commercial crop production. • Capability subclasses are soil groups within one class. They are designated by adding a small letter, e,w, s, or c,to the class numeral,for example, Be. • "e" shows that the main hazard is the risk of erosion unless close growing plant cover is maintained • "w" shows that water in or on the soil interferes with pant growth or cultivation. • "s" shows that the soil is limited mainly because it is shallow, droughty, or stony. • "c" shows that the chief limitation is climate that is very cold or very dry. -Note:All of the soils at the dairy site have been leveled for sane time.They have also been ripped to breakup the consolidated areas.They have also had agenic materials(manure solids)applied that improves soil filth,water holding capacity,water percolation rate,aosion and nutrient holding capacity. Western Design/David Avila 2000 11