TY  - BOOK
AU  - Ayanaba,A.
AU  - Dart,P.J.
AU  - 
TI  - Biological nitrogen fixation in farming systems of the Tropics
SN  - 0471994995
PY  - 1977///
CY  - Chichester
PB  - Wiley
KW  - Nitrogen
KW  - Fixation
KW  - Congresses
KW  - Agriculture
KW  - Tropics
KW  - Cropping systems
N1  - 'Based on papers presented at a symposium held at the International Institute of Tropical Agriculture, Ibadan, Nigeria, in October 1975.'; Includes bibliographies and index
ER  -