Regional action learning programme on the development of conservation farming systems :  report of the training course, Agoo, La Union Province, Northern Luzon, The Philippines, 25 June - 20 July 1990. 

 - Jakarta, Indonesia :  Asia Soil Conservation Network,  1990. 
 - 79 p. :  ill. 
 - ASOCON report ;  no. 4 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural systems.