TY  - BOOK
AU  - Singh, Uma Shanker Prasad
TI  - Performance of maize varieties under different dates of sowing and graded levels of nitrogen
U1  - 630 S 643 P 
PY  - 1991///
CY  - Bhagalpur
PB  - BAC, Sabour
KW  - Agronomy
ER  -