Kanua, Matthew Wela Bamuna. <br/><br/>
Nutrient supply in volcanic ash soils for foodcrop production in the Highlands of Papua New Guinea / 
Matthew Wela Bamuna Kanua. 
 - England :  University of Reading, Dept. of Agriculture and Food,  1991. 
 - 113 p. :  maps. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Andosols--Papua New Guinea.<br/>Food crops--Papua New Guinea.