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N. A. Onunka

National Root Crops Research Institute, University of Agriculture Umudike

aonunka@yahoo.com
3 Publications
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Publications 3

1
Research Article Vol. 31, Issue 1

Agronomic Potentials of Boiler Ash Derived from Oil Palm Wastes as Fertilizer, Soil Amendment, and Liming Materials

Ezema Raymond Anikwe*, Asadu Charles Livinus, N. A. Onunka, Ifejimalu, A. C

One potential problem with recycling power plant ashes is its variability both from fuel to fuel and within a certain fuel-type. This study obtained information on the main components of ashes derived from burning oil palm mill wastes in boilers for energy generation to obtain reference data for the development of its utility possibilities with par...

Apr, 2021 Vol. 31, Issue 1 230 views 628 downloads
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2
Research Article Vol. 21, Issue 2

Integrated Nutrient Application Effect on Npk Absorption and Root Yield of Sweet Potato (ipomoea Batatas (l) Lam) in a Tropical Ultisol

N. A. Onunka*, V.E. Osodeke, D. O. Asawalam, C. N. Ebeniro.

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 rate...

Aug, 2011 Vol. 21, Issue 2 253 views 530 downloads
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3
Research Article Vol. 21, Issue 2

Effect of Poultry Manure on Soil Chemical Properties and Root Yield of Sweet Potato (ipomoea Batatas (l) Lam) Grown in a Tropical Ultiso

N. A. Onunka*, V.E. Osodeke, D. O. Asawalam

A field trial was conducted at National Root Crops Research Institute Umudike in 2004/2005 cropping seasons. The aim was to evaluate the effect of poultry manure applied over time intervals on some soil chemical properties and root yield of Sweet potato. The time intervals were 2 weeks before planting, (WBP), at planting, 2, 4, and 6 weeks after pl...

Aug, 2011 Vol. 21, Issue 2 259 views 570 downloads
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