Harold D. Hughes creator Macmillan Publishing Co London 1972 3rd ed xi , 627 p illus 24 cm Agriculture beginnings (Page-1), World production distribution (Page-10), US production distribution (Page-27), The world food population problem (Page-41), Agricultural production adjustments (Page-57), Climate weather and crops (Page-71), Water use by crops (Page-142), Irrigation ,drainage and dryland farming (Page-156), The soil and croping practices (Page-176), Wheat and rye (Page-352), The soybean crop (Page-370), Potatos (Page-430), Alfalfa (Page-503), Dryland grasses (Page-567), Crop enemies (Page-577), Crop terms (Page-602). Harold D. Hughes & Darrel S. Metcalfe Harold D. Hughes Crop production 630,HUG 20230104130502.0