International Symposium on Distribution, Characteristics, and Utilization of Problem Soils :  proceedings of a symposium on tropical agriculture research, Tsukuba, October 19-26, 1981. 

 - Tokyo :  Japanese Society of Soil Science and Plant Nutrition,  1982. 
 - 417 p. :  ill. ;  26 cm. 
 - Tropical agriculture research series ;  no.15. .
 - Tropical agriculture research series ;  no.15. .
<br/><br/><label>LCCN: </label>85-670166 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Problem soils--Congresses.<br/>Soils--Tropics--Congresses.