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DA Okpara

Observed names: D.A. Okpara, Okpara, D.A.
OpenAlex ID: A5111681992
Effects of Nitrogen and phosphorus fertilizer rates on the growth and yield of sesame (Sesamum indicum L.) in the southeastern rain forest belt of Nigeria
2009 · DA Okpara, CO Muoneke, et al. · Nigeria Agricultural Journal · 25
Growth and yield responses of sweet potato to inorganic nitrogen and potassium in a tropical ultisol
2010 · JC Njoku, DA Okpara, et al. · Nigeria Agricultural Journal · 18
Evaluation of cassava (Manihot esculenta (Crantz) planting methods and soybean [Glycine max (L.) Merrill] sowing dates on the yield performance of the component species in cassava/soybean intercrop under the humid tropical lowlands of southeastern Nigeria
2009 · E. U. Mbah, CO Muoneke, et al. · AFRICAN JOURNAL OF BIOTECHNOLOGY · 9
The effect of planting dates on seven varieties of soybean Umudike agroecosystems of South Eastern Nigeria
2009 · DA Okpara, TO Ojikpong, et al. · Nigeria Agricultural Journal · 4
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Combinations of organic and inorganic fertilizers for vine, carotene and root yields of orange-fleshed sweetpotato at Umudike, southeastern Nigeria
2015 · F Akpaninyang, DA Okpara, et al. · Nigeria Agricultural Journal · 3
Effects of staking, nitrogen and phosphorus fertilizer rates on yield and yield components of African yambean ( Sphenostylis stenocarpa )
1995 · DA Okpara, CPE Omaliko · Ghana Journal of Science · 3
Effect of plant spacing and sowing date on Sesame (Sesamum indicum L.) production in south Eastern Nigeria
2009 · TO Ojikpong, DA Okpara, et al. · Nigeria Agricultural Journal · 2
Biomass and seed production of twelve soybean varieties in fish pond in Southeastern Nigeria
2009 · CO Ofor, DA Okpara · Nigeria Agricultural Journal · 2
Influence Of Plant Density And Nitrogen Fertilization On Late-Season Forage Maize
2008 · DA Okpara, CP Omaliko · Journal of Applied Chemistry and Agricultural Research · 2
Response of sweetpotato to duration of mucuna fallow
2003 · JC Njoku, DA Okpara, et al. · Tropical Science · 2
Forage millet response to irrigation and nitrogen fertilization in the derived savanna zone of Nigeria
1995 · DA Okpara, CPE Omaliko · Ghana Journal of Science · 2
Evaluation of slips of white yam ( Dioscorea rotundata poir ) genotypes for mini-tuber production in the humid tropics
2014 · AI Ikoro, DA Okpara, et al. · Nigeria Agricultural Journal · 1
Influence of four varieties of sesame (Sesame indium L.) on maize/sesame intercropping in the Southeastern rain forest belt of Nigeria
2008 · TO Ojikpong, DA Okpara, et al. · Global Journal of Pure and Applied Sciences · 1
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Effect of growth media on propagation of four varietie of cassava
2007 · DA Okpara, SO Baiyeri · Global Journal of Agricultural Sciences · 1
Potentials of covercrops for sustainable short fallow replacement in low-input systems of maize production in the humid tropics
2006 · DA Okpara, JE Ikeorgu, et al. · Global Journal of Agricultural Sciences · 1
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Growth, cane yield and sugar content of six genotypes of sugarcane in a forest zone of southeastern Nigeria
2004 · DA Okpara, PI Okocha · Agro-Science · 1
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Determining the Effect of Location, Variety and NPK Fertilizer on Growth and Yield of Sweetpotato Raised in Triple S System in Southeastern Nigeria
2026 · Nwadinobi C.A., Okpara, D.A., et al. · Asian Journal of Research in Crop Science
Effect of spent mushroom compost on orange-fleshed sweetpotato and provitamin-A maize productivity in an intercrop under Nigerian conditions
2026 · D.A. Okpara, P.L. Ogbologwung, et al. · African Crop Science Journal
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Effects of Climatic Variations on Leaf Litter Production in A. Floribunda Agroforestry System in South - East Nigeria
2020 · Keyejo, A.O, Okpara, D.A., et al. · Nigerian Journal of Soil Science
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Productivity of Cocoyam/Vegetable Cowpea Intercrop as Influenced by spatial Arrangement and Cowpea Growth Habits
2012 · DA Okpara, GC Chukwuekezie, et al. · Nigeria Agricultural Journal
Works count: 20
Citation count: 77
H-index: 4
I10-index: 2
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