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The yam is an important food crop, especially in the so-called ‘yam zone’ of West Africa: total world production is about 19 million tonnes per annum, some 70 per cent of it grown in Nigeria.… (More)
Multilocational trials were conducted in the coastal savanna, forest and forest/savanna agro-ecologies of Ghana in 1996 and 1997 to identify early-maturing sweetpotato varieties. Seven genotypes… (More)
SUMMARY Investigations were carried out at Nyankpala in the guinea savanna and at Kwadaso in the forest zone of Ghana in two growing seasons on the effects of staking, fertilizer application and… (More)
SUMMARY The investigations were carried out at Nyankpala in the guinea savanna and at Kwadaso in the forest zone of Ghana in two growing seasons. Early topping always produced less tuber yields but… (More)