TY  - GEN
AU  - Giller, Ken E
TI  - Nitrogen Fixation in Tropical cropping systems
SN  - 0851994172
U1  - 633.309 13 GIL 
CY  - U.K., CAB International
KW  - Tropical soils, Tropical crops, cynobacteria, Azolla, Grain Lewumes Green Manure, Understorey legumes shade Trees, Agroforestry
ER  -