TY  - BOOK
AU  - Singh, Dalip
TI  - Comparative effects of nitrogenous fertilizers and varying levels of biuret in used on the potato (Solanum Tuberosum L.) : disseration submitted to the Punjab Agricultural University in partial fulfilment of the requirements for the degred of Doctor of Philosphy in Agronomy
PY  - 1975///
CY  - Ludhiana
PB  - Punjab Agricultural University
ER  -