TY  - BOOK
AU  - NAIN, Surendra Pal Singh
TI  - To study the effects of preceding crops on toria (Brassica campestris) and wheat (Triticum vulgare) under various levels of nitrogen
U1  - T 633.85 N15T 
PY  - 1969///
CY  - Ludhiana
PB  - P.A.U
KW  - OILSEED PLANTS
KW  - WHEAT
ER  -