TY  - BOOK
AU  - Sharma, Uttam Chand
TI  - Use of plant in determinine the critical concentrations of nutrients and pnedicting their requirment for : disseration submitted to the punjab Agricultural in potato fulfilment of the requirements for the degree of Doctor of philosophy in soil science
PY  - 1985///
CY  - Ludhiana
PB  - Punjab Agricultural University
ER  -