Kanua, Matthew Wela Bamuna.
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.
Andosols--Papua New Guinea.
Food crops--Papua New Guinea.
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.
Andosols--Papua New Guinea.
Food crops--Papua New Guinea.