chemical status and the prediction of sweet potato yields

Abstract

In a sweet potato (Ipomoea batatas (L.) Lam.) yield survey in North Simbu, Papua New Guinea, significant multiple linear regressions were found for first harvest yields of tubers on soil variables within the great groups of Hydrandepts and Troporthents and the suborder of Tropepts; pH, available P, phosphate retention and available K all showed positive effects on yield.