Management of vertisols for improved agricultural production / Proceedings of an IBSRAM Inaugural Workshop 18-22 February, 1985, ICRISAT Center, India - Andhra Pradesh: International Crops Research Institute for the Semi-Arid Topics, 1989 - v, 278p. ISBN: 92-9066-139-9 Subjects--Topical Terms: Agriculture Subjects--Index Terms: Agroecological zones Land and water