TY  - BOOK
AU  - Singh,A.L.
AU  - Singh,Pushp Lata
TI  - Nitrogen fixation in Indian rice fields (Azolla & blue green algae)
SN  - 8185031258
U1  - 631.840954 22
PY  - 1989///
CY  - Bikaner
PB  - Agro Botanical Pub.(India)
KW  - Nitorgen fertilizers
KW  - India
KW  - Nitrogen
KW  - Fixation
KW  - Nitrogen-fixing algae as fertilizer
KW  - Cyanobacteria
N1  - Includes bibliographical references
ER  -