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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />,.~ .,..-, () :"" ('j <br />'J -~' ,,_.j :; j <br /> <br />extent, in Phillips and Smith counties, may produce 0.78 to 3.1 tons/acre/ <br />year." To provide some meaning to these figures, it is estimated that a ten <br />ton per acre annual erosion rate is equivalent to removing about one inch of <br />topsoil every 15 years. <br /> <br />The detailed soil survey for Grant County was reviewed as representative <br />for southern Kansas. In general, the Ulysses-Richfield soil s association <br />covers 65 percent of the County. Suitability for crops is said to be limited <br />because of low rainfall and recurrent drought. Soil blowing is a secondary <br />hazard. However, on the Manter-Satanta-Otero associ ati on, whi ch covers 15 <br />percent of the county, soil blowing is the main hazard; climatic conditions <br />are secondary. Both water erosion and soil blowing are hazards in the other <br />associations (remaining 20% of the area) with small areas of blown-out land. <br />In summary, wind erosion is a continuing hazard and water erosion is a <br />hazard on all sloping, silty soils that are cultivated. <br /> <br />The detailed soil survey for Sherman County was reviewed as represen- <br />tative for northern Kansas. Two soils, Keith silt loam and Ulysses silt <br />loam, cover 42.6% and 33.1% of the county respectively for a total of 75.7%. <br />On both Keith and Ulysses silt loam controlling soil blowing and water ero- <br />sion and conserving moisture are the main problems. <br /> <br />New Mexico <br /> <br />A March 1974 statewide survey indicates erosion rates of sheet, rill, <br />gully and streambank erosi on of 1 esS than 0.5 to 8.2 tons/acre/year in the <br />study area. Most of the 1 and is c1 ass ifi ed in the 0.5 to 1. 4 range, <br />inc1 uding the important farming areas of Roosevelt and Curry Counties. <br /> <br />The detailed soil survey for Curry County was reviewed as this is <br />centrally located and is said to be "one of the agriculturally most important <br />counties in the state." The mode of irrigation has been flood on fine tex- <br />tured soils and center pivot on sandy soils. The Amarillo-Clovis fine sandy <br />10ams cover about 31 percent of the county. "These soils are highly erodible <br />and must be protected to prevent damage from wind. Tivo1i-Springer- <br />Brownfield sands cover about 7 percent of the county. Those areas in this <br /> <br />1-5 <br />