Show selecting lands por for war crops Is discussion subject selecting lands best adapted to the th of war crops has been the production principal theme of a conference which survey irvey supervisors of the soil conser service have just cox completed ith regional ree ional officials it at the conference seven survey su J visors from new mexico utah irazona arid and colorado discussed the test t means of adapting soils s surveys 10 the rations nations need for increased tood food production with nearly half of the former S C S oft now serving in the nations timed forces it was declared that first priority in soils surveys must be given give n to kland land capable of yielding the great at st harvest of critical crops during the past five years dicres ol of cultivated land have been surveyed by the S C S in the southwest region of which acres were in utah Gerte generally rally speaking over irrigation causes more land trouble than under irrigation Irrl over irrigation especially if drainage Is inadequate reduces crop fields and tends to bring alkali salts to the top layer of soli soil crop production Is reduced if more t than h an 2 per cent of alkali exists in bil 1011 and remedial steps must be taken de land has alkali exceeding 5 per tent cent S C S soils surveys classify culli gilted land into four classes class I 1 land considered the most deniable cropland must be level or nearly marly level have good drainage and fertility and should contain no harmm harmful concentrations of alkali class cass 2 land Is suitable for cultivation if simple conservation measures ire adopted conservation measures nest most commonly used are contour til all alte ae strip cropping cover crops crop rotations that include grasses or le umes jumes simple terrace systems rough tillage stubble mulching and blank listing class 2 irrigated lands may be successfully cess fully farmed by adopting simple hanage practices and by laying out irrigation runs to meet slope and soil requirements class 3 land may be cultivated only til II 11 intensive conservation practices are applied and class 4 land should be bed only for occasional or limited cultivation ti lint lon frequently class 3 and 4 lulls hils will make their greatest grea iest warthe contribution if used to produce hy ind and forage crops |