TY  - REP
AU  - Hergert,G.W.
TI  - Ecofarming concept in multiple grain rotations with minimum tillage in semiarid climates:  fertilizer management
U1  - 83-900153 
PY  - 1981///
KW  - Cereals general
KW  - Cultivation
KW  - AGROVOC
KW  - Fertilizers
KW  - Semiarid zones
KW  - Soil fertility
N1  - ill. Includes 6 ref
ER  -