Integrated Nutrient Application Effect on Npk Absorption and Root Yield of Sweet Potato (ipomoea Batatas (l) Lam) in a Tropical Ultisol
1 National Root Crops Research Institute, University of Agriculture Umudike
2 Department of Soil Science and Meteorology, Michael Okpara University of Agriculture, Umudike
* Corresponding author: aonunka@yahoo.com
2 Department of Soil Science and Meteorology, Michael Okpara University of Agriculture, Umudike
* Corresponding author: aonunka@yahoo.com
Abstract
A field trial was conducted at National Root Crops Research Institute, Umudike, Abia State Nigeria, in 2004/2005 cropping seasons. The aim was to determine the effect of integration and time of application of two nutrient sources (poultry manure and inorganic fertilizer) on NPK absorption and root yield of sweet potato in an ultisol. Different rates of the two nutrient sources including a control were applied over four time intervals (0, 2, 4, 6, WAP). Results showed that time of application had no significant effect on NPK absorption rate of the crop. Application of equal mixture of the two nutrient sources (50 %) produced the highest root yield and is therefore recommended for optimum NPK absorption and root production.
Keywords
application
integrated
absorption
nutrient
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How to Cite
Onunka, N. A., Osodeke, V., Asawalam, D. O., & Ebeniro., C. N. (2011). Integrated Nutrient Application Effect on Npk Absorption and Root Yield of Sweet Potato (ipomoea Batatas (l) Lam) in a Tropical Ultisol. Nigerian Journal of Soil Science, 21(2), 134-141. https://doi.org/10.67042/njss.2011.vcu0r6vi
N. A. Onunka, V. Osodeke, D. O. Asawalam, and C. N. Ebeniro., "Integrated Nutrient Application Effect on Npk Absorption and Root Yield of Sweet Potato (ipomoea Batatas (l) Lam) in a Tropical Ultisol," Nigerian Journal of Soil Science, vol. 21, no. 2, pp. 134-141, August 2011. doi: 10.67042/njss.2011.vcu0r6vi
