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CP 2 of 2 <br /> If this unit is used for irrigated row, field , and orchard crops , the <br /> main limitation is slow permeability . Furrow, border , corrugation , and <br /> sprinkler irrigation systems are suited to this soil . Because of the <br /> slow permeability of this soil , the length of runs should be adjusted <br /> to permit adequate infiltration of water . The application of water <br /> should be regulated so that water does not stand on the surface and <br /> damage the crops . The soil in this unit should be cultivated only when <br /> it is within a narrow range of moisture content . The soil is too <br /> sticky 'to cultivate when it is wet , and is too hard to cultivate when <br /> it is dry. A cropping system that includes crop rotation or a cover <br /> crop , use of crop residue and proper tillage improves soil ti | th and <br /> increases fertility and water infiltration . Crops respond to nitrogen <br /> and phosphorus fertilizer . <br /> If this unit is used for urban development , the main limitations are <br /> slow permeability, low strength , and high shrink-swell capacity . If <br /> the soil is used for septic tank absorption fields , the limitation of <br /> slow permeability' can be overcome by increasing the size of the <br /> absorption field . If the density of housing is moderate to high , <br /> community sewage systems are needed to prevent contamination of water <br /> supplies as a result of seepage from on-site sewage disposal systems . <br /> Buildings and roads should be designed to offset the limited ability of <br /> the soil in this unit to support a load . If buildings are constructed <br /> on this soil , properly designing foundations and footings and diverting <br /> runoff away from buildings help to prevent structural damage because of <br /> shrinking and swelling . <br /> The map unit is in capability units IIs-5 ( 17) , irrigated , and IVs-5 <br /> ( 17) , non- irrigated . <br /> p/9/R7 <br />