TY  - BOOK
AU  - SUKHRAJ Singh
TI  - Response of maize and wheat in rotation to nitrogen and phosphorus in ralation to levels of preparatory tillage
U1  - 633.111 S92R 
PY  - 1985///
PB  - P.A.U Ludhiana
KW  - WHEAT
KW  - AGRONOMY
KW  - CROP PROD
KW  - FERTILIZER
KW  - MAIZE
KW  - ROTATION OF CROPS
KW  - TILLAGE
N2  - Preparatory tillage levels ( zero, 1 and 4 cultivations) were tested under varying levels of N (60, 90 and 120 kg/ha) and P (0 and 60 kg P20S/ha). Different levels of tillage did not cause a significant change in the grain and yield of maize and wheat. Th
ER  -