Technologies for sustainable agriculture in the tropics : proceedings of two international symposia sponsored by Division A-6 of the American Society of Agronomy in San Antonio, TX, and Denver, CO, 1990 and 1991 respectively /
editors, John Ragland and Rattan Lal.
- Madison, Wis., USA : American Society of Agronomy, 1993.
- xix, 313 p. : ill.
- ASA special publication ; no. 56 .
0891181180
Sustainable agriculture--Tropics.
Sustainable agriculture--Developing countries
0891181180
Sustainable agriculture--Tropics.
Sustainable agriculture--Developing countries