Tillage systems for soil and water conservation /
Tillage systems for soil and water conservation / / by Paul W. Unger.
Rome : :Food and Agriculture Organization of the United Nations, ,1984.
xvi, 278 p. : ,ill. ; ; 30 cm.
9251021546 (pbk.)
FAO soils bulletin ; 54
Tillage
Cropping systems
Conservation tillage
Soil conservation
Water conservation
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