TY  - BOOK
AU  - N Vasuki
AU  -  B V Venkata Rao  Department of Soil Science and Agricultural Chemis
TI  - Effect of continuous application of heavy doses of ammonium sulphate on the availability of copper, manganese and zinc
U1  - 630 
PY  - 1973///
CY  - Bangalore
PB  - University of Agricultural Sciences, Bangalore
ER  -