TY  - GEN
AU  - International Congress of Soil Science (12th) 
TI  - Proceedings: Managing soil resources
PY  - 1981///
CY  - New Delhi
PB  - Indian Society of Soil Science
KW  - Soil Science
KW  - Nitrogen Fixation
KW  - Organic Matter
N1  - Vol. 2 : Non-symbiotic nitrogen fixation and organic matter in the tropics
ER  -