TY  - BOOK
AU  - GILL, Pirthi Pal Singh
TI  - Effect of nitrogen on cotton, moong and maize grown in early summer and kharif season and their after effects on the succeeding crops of wheat, barley and pea
U1  - T 631.84 G36E 
PY  - 1969///
CY  - Ludhiana
PB  - P. A. U
KW  - NITROGEN FERTILIZERS
ER  -