TY  - GEN
AU  - Aggarwal,R.K.
TI  - Investigations on soil testing on maintenance of soil fertility in relation to high yielding varieties of wheat and paddy
KW  - Soil analysis
KW  - Soil fertility
KW  - Paddy
KW  - High yielding  varieties
KW  - Wheat
KW  - Npk fertilizers
KW  - Nutrient
KW  - Yield
ER  -