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Prof. Asawalam Damian Okwudiri

Micheal Okpara University of Agriculture, Umudike

d.asawalam@gmail.com
4 Publications
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Publications 4

1
Research Article Vol. 34, Issue 2

Optimization of N, P and K Fertilization for Orange-Fleshed Sweet Potato (Ipomoea batatas (L) Lam) Production at Ikwo Abakaliki, Southeast Nigeria

Iroegbu, C.S.*, Asawalam Damian Okwudiri, V.E. Osodeke

Orange-fleshed Sweet potato (Ipomoea batatas (L) Lam) is one of the most important crops for human consumption and livestock feed. All parts of the plant are useful for human consumption, animal feed and industrial uses. This research was conducted on a degraded Ultisol at the Teaching and Research Farm, Faculty of Agriculture, Alex Ekwueme Federal...

DOI: 10.67042/njss.2025.1xy3t2fe
Aug, 2025 Vol. 34, Issue 2 341 views 340 downloads
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2
Research Article Vol. 26, Issue 2

Influence of Agro - Wastes on Soil Properties, Growth and Yield of Maize (zea Mays L.) in an Acid Ultisol of Owerri, Imo State

Onwudike S U*, Asawalam Damian Okwudiri, Ano, A. O.

We investigated the effect of selected agro-wastes on soil properties, growth and yield of maize (Zea mays) in a Typic Haplusult during 2011 and 2013 planting season at the Teaching and Research Farm of Federal University of Technology, Owerri Imo State Southeastern Nigeria (Latitudes 5° 21’ N and 5° 27’ N and Longitudes 7° 02’E and 7° 15’ E). The ...

DOI: 10.67042/njss.2016.wuirjrys
Aug, 2016 Vol. 26, Issue 2 177 views 240 downloads
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3
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, Asawalam Damian Okwudiri, 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...

DOI: 10.67042/njss.2011.vcu0r6vi
Aug, 2011 Vol. 21, Issue 2 165 views 262 downloads
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4
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, Asawalam Damian Okwudiri

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...

DOI: 10.67042/njss.2011.kxzc8oqy
Aug, 2011 Vol. 21, Issue 2 178 views 282 downloads
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