R. S. D. Pena

Yields of upland and lowland taro at varying plant densities

R. S. D. Pena, 1978 .

Taro (Colocasia escalenta).

D. Plucknett, R. S. D. Pena, F. Obrero, 1970 .

P nutrition of cassava, including mycorrhizal effects on P, K, S, Zn and Ca uptake

P. Zaag, R. Yost, R. Fox, 1979 .

Chemical weed control in a ratoon cropping system for sorghum

S. R. Obien, D. Plucknett, R. S. D. Pena, 1975 .

Nutrient Deficiences and Excesses in Taro

S. Miyasaka, R. Hamasaki, R. S. D. Pena, 2002 .

Effects of Nitrogen Fertilization on the Growth, Composition and Yield of Upland and Lowland Taro (Colocasia esculenta)

D. Plucknett, R. S. D. Pena, 1972, Experimental Agriculture.