TY  - BOOK
AU  - Ashwani Kumar
TI  - Effect of phosphorus and potassium on the availability of zinc in a long term fertilizer experiments
U1  - T 631.83 A81E 
PY  - 1978///
CY  - Ludhiana
PB  - PAU
KW  - SOILS -- ZINC CONTENT
KW  - MAIZE - ZINC
KW  - PHOSPHORUS & POTASSIUM
KW  - SOIL FERTILITY
KW  - SOIL SCIENCE
KW  - SOILS
N2  - Continuous application of P fertilizers during the six cycles of crop rotation, the initial low P status of the soil raised to high status at all rates of phosphatic fertilizers Relationship between available P and availab'~ K with total P & K applied dur
ER  -