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<br />. <br /> <br />I' <br />t <br />,. <br />f'-. <br />I'. <br />,.- <br />,. <br /> <br />! <br /> <br />Irrig~~i~I1._S.9Ll Cl~sses. <br />Soils suitable fo~ irrigation comprise 7,283,000 acres and are <br /> <br />\ <br /> <br />approximately 30 percent of the total land area. They are scattered <br /> <br />throughout the Basin. <br /> <br />~\ <br /> <br />The tabulation of soils according to irrigation soil class was <br /> <br />based on characterfx~~c~ /~~2;:~;: i %~~.~nJ:1/~,;;:h;.~,.i~~).~v.fJr J~s E~~,~j~, .:~;Sf><~~' <br /> <br />y I~;;!! dS Irll'....'.:-:.V.V &d,~ a,7:1 P'~'c./o!"c T,'';~~_~ ~n.- Cl C,:Jl.N11l ~J~':> .' .f" .. <br />under irrigation. Irrigation soil/c~ass A has none to slight soil <br /> <br />limitations; class B has moderate soil limitations; class C has severe <br /> <br />~ . <br /> <br />soil limitations; and class D very severe soil limitations. <br /> <br />. <br />} <br /> <br />Irrigation soil classes provide a base for conversion to irriga- <br /> <br />,. <br /> <br />.- <br /> <br />tion land classes through application of further constraints related <br /> <br />primarily to development costs such as clearing of brush, trees, <br /> <br />stones, leveling, and drainage. Also they do not consider such eco- <br /> <br />nomic factors affecting feasibility of irrigation development as size <br /> <br />~ <br /> <br />and shape of tracts or distribution pattern of the laLds. <br /> <br />~ <br /> <br />ZJZ ,c-.; <br /> <br />()~Q'1 <br /> <br />. <br /> <br />II <br />