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ISSN: 2354-4147: International Standard Journal Number (ISJN) e-ISJN: A4372-2604
Simulation of major soil nutrients requirement for maize production using the QUEFTS model in the Northern region of Ghana
Article Number: DRJA43071532
Original Research Article
M. Antwi1*, A. A. Duker2, M. Fosu3 and R. C. Abaidoo4, 5
1Department of Crop and Soil Sciences, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana.
2Department of Geomatic Engineering, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana.
3Council for Scientific and Industrial Research, Savanna Agriculture Research Institute, Tamale, Ghana.
4College of Agriculture and Natural Resources, Kwame Nkrumah University of Science and Technology,
5International Institute of Tropical Agriculture, Ibadan, Nigeria.
Received: January 7, 2017 Accepted: February 25, 2017 Published: March 1, 2017
Fertilizer requirement identification at specified Districts is necessary to increase applied fertilizers efficiency. The aim of this study was to estimate promising nitrogen (N), phosphorus (P) and potassium (K) nutrients requirements for maize production in 13 Districts of the Northern region, Ghana, using the Quantitative Evaluation of fertility of tropical soils (QUEFTS) model. Soil samples were collected from 104 locations and analysed for N, P and K contents. The QUEFTS model was calibrated using the required maize cultivation data from farmersâ€™ fields to obtain the necessary input parameters. The model predicted linear increase in maize grain yield if nutrients are recovered in balanced amounts of 0.49 kg kg-1 N, 0.33 kg kg-1 P and 0.67 kg kg-1 K with internal efficiencies of 35 kg N kg-1 and 77 kg N kg-1, 145 kg P kg-1 and 509 kg P kg-1, and 32 kg K kg-1 and 114 kg K kg-1 to obtain about 60 â€“ 70 % of the potential maximum yield. Maize grain yield showed a good correlation with N (92%), P (92%) and K (71%). Results from the study could be used to enhance soil fertility and maize crop yields in the study area.
Key words: Nutrient requirement, fertilizer recommendation, maize yields, major soil nutrients, smallholder farmers, nutrient simulation