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Soil productivity as affected by crop rotation
Weir, Wilbert Walter , 1882-
Soil productivity , Crop rotation , crop yield , crop rotation , cropping systems , soil productivity , soil fertility , soil quality , soil management , tillage , intercropping , legumes , cropping sequence , plant cultural practices , crop management , cover crops , grain crops , green manures , soil conservation , fertilizers , soil
- 22 p. : ill. ; 23 cm.
- U.S. Dept. of Agriculture
Organic Roots Collection