00332nam a2200085Ia 4500008004100000082002800041100002000069245009900089260005800188220204s9999    xx            000 0 und d  a631.452:633(548.3)bRAJ  aRAJASEKHARAN, P 0aSoil fertility assessment and information management for enhancing crop productivity in Kerala  aThiruvananthapurambKerala State Planning Boardc2013