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122 blowing. Areas adjacent to levees are subject to lateral Most areas are used for irrigated crops. 1 seepage in wet years when the water level is high, may provide wetland functions and values. " Careful applications of irrigation water are needed to should be considered in plans for enhancers prevent the buildup of a high water table. A drainage wildlife habitat or land use conversion. system may be needed. Deep-rooted crops can be This unit is suited to irrigated row and fiel i grown in areas where natural drainage is adequate or The main limitations are subsidence and the where a drainage system has been installed. Furrow, table. General management considerations border, and sprinkler irrigation systems are suitable, severe hazard of soil blowing. Because this When the wind velocity is high in spring, the hazard of subject to differential subsidence, frequent Ir soil blowing can be reduced by properly managing all the fields is needed to improve the efficient} crop residue and by minimizing tillage. irrigation. Areas adjacent to levees are subjf The Scribner soil is in capability units Ilw-2 seepage in wet years when the water level i (MLRA-17), irrigated, and 1Vw-2 (MLRA-17), Careful applications of irrigation water are no nonirrigated. It is in vegetative soil group A. The Urban prevent the buildup of a high water table. La land is not assigned a capability classification or a and small spud ditches provide subirrigation vegetative sail group. ov im r p e drainage. Subrrngation, furrow, bort sprinkler systems are suitable. Where a sub 246—Shima muck, partially drained, 0 to 2 percent system is used, the water table is raised to slopes. This very deep, very poorly drained, nearly foot at planting time and then is slowly lower level soil is on deltas. It formed in the highly the growing season until it is at a depth of ai decomposed remains of reeds and tules and in alluvium at harvest time. When the wind velocity is hi derived from mixed rock sources. Levees, drainage spring, the hazard of soil blowing can be rea ditches, and pumping of the water table alter the properly managing all crop residue and by rr j drainage of this soil. Elevation is 15 feet below sea tillage. Levees should be checked periodical level to 5 feet above. The average annual precipitation proper maintenance program should be devF is about 14 inches, the average annual air temperature This map unit is in capability units lllw-10 is about 60 degrees F, and the average frost-free period irrigated, and IVw-1 o (MLRA-16), nonirrigate is about 270 days. vegetative soil group E. Typically, the surface layer is very dark gray muck about 21 inches thick. The upper 2 inches of the 247—Shinkee muck, partially drained, 0 underlying material is very dark gray, mottled mucky percent slopes. This very deep-, very poorlyi clay loam. The lower part to a depth of 60 inches is nearly level soil is on deltas. it formed in the light brownish gray and light yellowish brown, mottled decomposed remains of reeds and tules and loamy sand. in some areas the surface layer is mucky derived from mixed rock sources. Levees, dr j loam or mucky clay loam. ditches, and pumping of the water table alter Included in this unit are small areas of Kingile and drainage a nage of this soil. Elevation is 15 feet belt Rindge soils and small areas of organic soils that have level to 5 feet above. The average annual pry a weakly cemented, moderately coarse textured is about 14 inches, the average annual air to substratum or a moderately fine textured substratum. Ail is about 60 degrees F, and the average frost of these included soils are in landscape positions is about 270 days. similar to the Shima soil. They make up about 15 Typically, the surface layer is very dark gr percent of the total acreage. about 22 inches thick. The upper 4 inches of Permeability is moderate in the upper part of the underlying" ymg materral is dark grayish brown, me Shima soil and very rapid in the mineral lower part, mucky clay loam. The lower part to a depth c Available water capacity is high. The effective rooting inches is grayish brown, mottled fine sandy Ic depth of the crops commonly grown in the county is some areas the surface layer is mucky loam. limited by an apparent water table that is regulated at a Included in this unit are small areas of Kin, depth of 3 to 4 feet by pumping. This soil is subject to Rindge, and Shima soils and small areas of c subsidence. Runoff is very slow, and the hazard of soils that have a fine textured substratum. All ' water erosion is slight. The rate of water intake in included soils are in landscape positions simi irrigated areas is 4.0 inches per hour. The hazard of those of the Shinkee soil. They make up aboi .E soil blowing is severe. The soil is subject to rare percent of the total acreage. flooding, which occurs during years of abnormally high Permeability is moderately slow in the Shir precipitation. Available water capacity is very high. The eff( i i