TY  - BOOK
AU  - Singh, A. L.,
TI  - Nitrogen Fixation in Indian Rice Fields (Azolla and Blue Green Algae)
SN  - 8185031258
U1  - 631 
PY  - 1989///
CY  - Bikaner
PB  - Agro Botanical Publishers
KW  - Nitrogen Fixation
KW  - Techniques, equipment & materials
ER  -