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<br /> <br />requirements would continue to be met principally from irrigated land. Irrigated <br />cropland would be replaced by developing land used for range and dry cropland. <br />Illustration 17 shows the projected land use shifts between 1965 and 2020. <br />Tbe largest additional land use requirements occur for recreation, mineral produc- <br />tion, urban and industrial and classified watersheds. Recreation and watershed lands <br />will accommodate certain other uses whereas urban and industrial and mineral pro- <br />duction lands generally exclude other uses. <br />Total land developed for irrigation is projected to remain almost constant <br />through 2020. However, about 245,000 acres of new cropland will have to be devel- <br />oped and 65,000 acres of presently idle land restored to meet production require- <br />ments and replace land converted to. other uses. Illustration 18 shows the present <br />and projected irrigated land requirements and land use changes. <br />Land available for grazing will be reduced by 2.4 million acres between 1965 and <br />2020 as a result of conversion to other uses. However, production from the re- <br />maining land would be increased through range improvement and management <br />practices. (Illustration 19.) <br /> <br />PROJECTED LAND USE ACREAGE SHIFTS <br /> <br />RECREATION <br /> <br /> <br />983 1500 <br /> <br />~"''''1B <br />"!i.;':'-:.:-," . ',.:-. <br />/.)k~,:,: .':'-:': <br /> <br />URBAN AND INDUSTRIAL <br /> <br />TRANSPORTATION AND UTILITIES <br /> <br />MINERAL PRODUCTION <br /> <br />DESIG. FISH AND WILDLIFE <br /> <br />CLASSIFIED WATERSHEDS <br /> <br />FLOOD CONTROL <br /> <br />IRRIGATED CROPLAND <br /> <br /> <br />DRY CROPLAND <br /> <br />RANGE <br /> <br />.800 -600 <br /> <br />-400 <br /> <br />-200 <br /> <br />o <br /> <br />+200 +400 +600 +800 <br /> <br />THOUSANDS OF ACRES <br />Illustration 17 <br /> <br />20 <br />