TY  - BOOK
TI  - Fertilizers and irrigation; higher returns an investment in irrigation through fertilizer use
U1  - PH631.67:631.8:631.526.325:633.18 '1.255(041)   L1 
PY  - 1971///
CY  - Zurich Switzerland
PB  - NPK
KW  - Fertilizers and manures,Farm produce-economic aspects,Irrigation water-Utilization
ER  -