TY  - BOOK
AU  - Unger,Paul W.
TI  - Tillage systems for soil and water conservation
SN  - 9251021546 (pbk.)
AV  - S604 .U54 1984
U1  - 631.451 19
PY  - 1984///
CY  - Rome
PB  - Food and Agriculture Organization of the United Nations
KW  - Tillage
KW  - Cropping systems
KW  - Conservation tillage
KW  - Soil conservation
KW  - Water conservation
N1  - Bibliography: p. 241-270
ER  -