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<br /> ' 88 Soil Survey
<br /> ' Because the soil Is droughty, applications of irrigation slow, and the hazard of water erosion is slight. The rate
<br /> water should be light and frequent. Careful applications of water intake in irrigated areas is 0.3 inch per hour.
<br /> are needed to prevent the buildup of a high water table. The soil is subject to rare flooding, which occurs during
<br /> ' Furrow, border, and sprinkler irrigation systems are years of abnormally high precipitation.
<br /> suitable. A tillage pan forms easily if the soil is tilled This unit is used mainly for irrigated row or field
<br /> when wet. Chiseling or subsoiling breaks up the pan. crops. It is also used for homesite development. It may
<br /> ' When the wind velocity is high in spring, the hazard of provide wetland functions and values. These should be
<br /> soil blowing can be reduced by properly managing all considered in plans for enhancement of wildlife habitat
<br /> crop residue and by minimizing tillage. or land use conversion.
<br /> This unit is suited to irrigated pasture. Irrigation water This unit is suited to irrigated crops. The main
<br /> can be applied by sprinkler and border methods. limitation is the high water table. Areas adjacent to
<br /> Leveling helps to ensure a uniform application of water. levees are subject to lateral seepage in wet years when
<br /> Proper stocking rates, pasture rotation, and restricted the water level is high. Careful applications of irrigation
<br /> ' grazing during wet periods help to keep the pasture in water are needed to prevent the buildup of a high water
<br /> good condition and protect the soil from compaction. table. Tile drainage can lower the water table if a
<br /> If this unit is used for homesite development, the suitable outlet is available. Furrow, border, and sprinkler
<br /> main limitation is depth to the hardpan. The rare irrigation systems are suitable. Returning crop residue
<br /> flooding is a hazard. Ripping the hardpan improves to the soil or regularly adding other organic material
<br /> permeability and thus also improves the suitability of the improves fertility, minimizes crusting, and increases the
<br /> soil for septic tank absorption fields. Houses, roads, and rate of water intake.
<br /> streets should be constructed above expected flood If this unit is used for homesite development, the
<br /> levels. main limitation is the high water table. The rare flooding
<br /> This map unit is in capability units Ills-8 (MLRA-17), is a hazard. The high water table increases the
<br /> irrigated, and IVs-8 (MLRA-17), nonirrigated. It is in possibility that septic tank absorption fields will not
<br /> vegetative soil group G. function properly. A drainage system is needed if roads
<br /> or building foundations are constructed. Houses, roads,
<br /> 197—Merritt silty clay loam, partially drained, 0 to and streets should be constructed above expected flood
<br /> t 2 percent slopes. This very deep, poorly drained, levels.
<br /> nearly level soil is on flood plains. It formed in alluvium This map unit is in capability units Ilw-2 (MLRA-17),
<br /> derived from mixed rock sources_ Mottles in the profile irrigated, and IVw-2 (MLRA-17), nonirrigated. It is in
<br /> indicate a poorly drained soil; however, drainage has vegetative soil group A.
<br /> t been improved by levees and reclamation projects.
<br /> Elevation is 5 to 50 feet. The average annual 198—Merritt silty clay loam, partially drained, 0 to
<br /> precipitation is about 13 inches, the average annual air 2 percent slopes, occasionally flooded. This very
<br /> ' temperature is about 60 degrees F, and the average deep, poorly dralned, nearly level soil is on flood plains.
<br /> frost-free period is about 270 days. It formed in alluvium derived from mixed rock sources.
<br /> Typically, the surface layer is grayish brown and dark Mottles in the profile indicate a poorly drained soil;
<br /> gray silty clay loam about 17 inches thick. The next 32 however, drainage has been improved by reclamation
<br /> ' inches is light brownish gray, grayish brown, and gray projects. Elevation is 5 to 50 feet. The average annual
<br /> silt loam and silty clay loam. The substratum to a depth precipitation is about 13 inches, the average annual air
<br /> of 60 inches is grayish brown fine sandy loam. In some temperature is about 60 degrees F, and the average
<br /> areas the surface layer is loam or silt loam, frost-free period is about 270 days.
<br /> Included in this unit are small areas of Grangeville, Typically, the surface layer is brown silty clay loam
<br /> Guard, and Ryde soils in landscape positions similar to about 15 inches thick. The subsoil and the upper part of
<br /> those of the Merritt soil. Also included are small areas the substratum are mottled light brownish gray and dark
<br /> ' of Egbert soils in the slightly lower landscape positions. gray silty clay loam about 27 inches thick. The lower
<br /> Included areas make up about 15 percent of the total part of the substratum to a depth of 60 inches is light
<br /> acreage. brownish gray, mottled silt loam. In some areas the
<br /> ' Permeability is moderately slow in the Merritt soil. surface layer is clay loam or loam.
<br /> Available water capacity is high. The effective rooting Included in this unit are small areas of Dello soils in
<br /> depth of the crops commonly grown in the county is the slightly lower landscape positions and Grangeville
<br /> limited by an apparent water table that has been soils in landscape positions similar to those of the
<br /> lowered to a depth of 4 to 6 feet through drainage Merritt soil. Also included are small areas of dominantly
<br /> systems that require continual maintenance. Runoff is moderately fine textured and moderately coarse
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