00366nam a22001097a 4500041001200000082001800012100001800030245006900048260008400117300001100201650004400212  aEnglish  a631.4bVEN/SO  aVenugopal V K  aSoil health management for sustainable crop production in Kerala  aThriuvanamthapurambDept. of Agriculture development and farmer's welfarec2019  a426 p.  asoil science and agricultural chemistry