00545nam a22001577a 4500 OSt 631.8 VIR/SO Soil fertility and fertiliser use: v.4 nutrient management and supply system for sustaining agriculture in 1990s New Delhi IFFCO 1990 xiv,357p. English Present agriculture production performance and future challenges Fertilisetr and sustainable agriculture Extension education in fertiliser management ddc BK 161195 161195 0 0 ddc 0 0 Gen KAUCLV KAUCLV GENERAL 2018-07-25 0 631.8 VIR/SO 809601 2018-07-25 00:00:00 2018-07-25 BK