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 ; organizing committee, John Ragland (1990), Augustine Uzo Mokwunye (1991) ; editorial committee, Kenneth Cassman ... [et al.] ; editor[s] in chief, Gary A. Peterson, P.S. Baenziger, Robert J. Luxmoore. 
 - Madison, Wis., USA :  American Society of Agronomy :  1993. 
 - xix, 313p. :ill. ; 
 - ASA special publication ; .
<br/><br/><label>ISBN: </label>0891181180 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sustainable agriculture--Congresses.<br/>Sustainable agriculture--Congresses.
<br/><br/><label>LC Class. No.: </label>S481.A4 1993  
<br/><br/><label>Dewey Class. No.: </label>630 s  338.1/0913