TY  - BOOK
AU  - Singh, A. K. 
TI  - International Conference on Managing Natural Resources for Sustainable Agricultural Production in the 21st Century: Extended Summaries Vol-4 :  Voluntary Papers 
U1  - 338.1  SIN-I 
PY  - 2002///
CY  - New Delhi
PB  - Indian Society of Soil Science 
ER  -