ICRISAT, Plot No. 17, Krishi Nagar, ICRISAT Colony, Phase II, Hashmathpet Road, Secunderabad, Andhra Pradesh - 500 011.
* Delivered on 17th June, 1997 at the Himachal Pradesh Krishi Vlshvavidyalaya, Palampur and organized by the Palampur Chapter of the Indian Society of Soil Science.
