%0 Journal Article
%T Response of Sweetpotato [Ipomoea batatas (L.) Lam.] to Five Rates Each of Nitrogen and Phosphorus under Guinea and Sudan Savannah Agroecological Zones of Ghana
%A Issah Alidu Abukari
%A Iddrisu Yahaya
%A Kwabena Acheremu
%A Joseph Adjebeng-Danquah
%A Issah Sugri
%A Julius Yirzagla
%A George Yakubu Mahama
%A Abdul-Latif Abdul-Aziz
%A Edward E. Carey
%A Putri Ernawati Abidin
%A Mutari Abubakari
%A Ahmed Seidu
%J American Journal of Plant Sciences
%P 1145-1161
%@ 2158-2750
%D 2024
%I Scientific Research Publishing
%R 10.4236/ajps.2024.1512073
%X A multi-locational field experiment was conducted to evaluate the effects of increasing rates of nitrogen and phosphorus on sweetpotato growth and yield at Bawku and Nyankpala. Shoot yield increased by 31%, 63%, 94% and 125% in Bawku and 49%, 98%, 148% and 197% in Nyankpala, when nitrogen was applied at 30, 60, 90 and 120 kg∙ha−1, respectively. When nitrogen was applied at 30, 60, 90 and 120 kg∙ha−1, storage root yield increased by 30, 46, 48, and 37% in Bawku and by 13, 17, 14 and 3% in Nyankpala, respectively. The optimum nitrogen required to maximize storage root yield were 80 and 62.5 kg∙ha−1 for Bawku and Nyankpala, respectively, in a split application at 2 and 6 weeks after planting. Storage root yield increased by 4%, 5%, 2% and −4% in Nyankpala and by 54%, 81%, 82%, 56% in Bawku, when 40, 80, 120 and 160 kg P were applied. Optimum phosphorus required to produce the highest storage root yield in this study are 67.5 and 101.3 t∙ha−1 for Nyankpala and Bawku, respectively. The maximum net return to investment occurred when 60 kg N∙ha−1 and 40 kg P∙ha−1 were applied at Bawku and Nyankpala, respectively.
%K Sweetpotato
%K Apomuden
%K Storage Root
%K Nitrogen
%K Phosphorus
%K Guinea Savannah
%K Sudan Savannah
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=138326