00474nam a2200121Ia 4500 130903s9999 xx 000 0 und d PH631.67:631.8:631.526.325:633.18 '1.255(041) L1 Fertilizers and irrigation; higher returns an investment in irrigation through fertilizer use. Zurich Switzerland NPK 1971 29p. Fertilizers and manures,Farm produce-economic aspects,Irrigation water-Utilization GRBK 0 0 0 0 KSD KSD 2013-09-03 0 PH631.67:631.8:631.526.325:633.18 '1.255(041) L1 G387 2013-09-03 00:00:00 2013-09-03 GRBK 81607 81607