TY  - BOOK
AU  - Kannan,V.
TI  - Studies on the effect of azolla and organic manures for N economy in rice (co.37)
KW  - Agricultural economics
KW  - Ferms
KW  - Green manures
KW  - Grain croops
KW  - Cereals
KW  - Nutrients
KW  - Varieties
ER  -