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Prof. Donatus Felix Uwah

Professor
Crop Science
donuwah@unical.edu.ng

...

Afangideh, U. M. and Uwah, D. F. (2001). Effects of different concentrations of polyethylene glycol on cells of three soybean cultivars. Global J. Pure and Appl. Scis. 7 (2): 229-233. (Nigeria)


Udo, E. J., Ibanga, I. J., Solomon, M. G., Abang, S. O., Ele, I. E., Ntia, J. D., Uwah, D. F., Ogbonna, K. I. and Akpanidiok, A. U. (1994). Project design and formulation: Obrenyi farm for National Agricultural Land Development Authority (NALDA). (Nigeria)


Uwah, D. F. and Solomon, M. G. (1997). Yield and quality of watermelon (Citrullus lanatus (thumb) Mansf) as influenced by different levels of nitrogen and phosphorus fertilizers in a northern guinea savanna environment. Nigerian Southeast J. of Agric. Econs. and Ext. 1 (2and3): 66 -77. (Nigeria)


Solomon, M. G. and Uwah, D. F. (1996). Varietal trials of soybean and their contribution to soil nitrogen. J. Applied Chemistry and Agricultural Res. Vol. 3: 25-31. (Nigeria)


Solomon, M. G., Umoh, E. O., Itam, E. and Uwah, D. F.(1995). Improvement of baking quality of soybean by incorporation of gluten genes from wheat. Project submitted to Raw Material Research and Development Council, Lagos. (Nigeria)


Uwah, D. F. and Solomon, M. G. (1998). Effects of nitrogen and phosphorus on yield and yield component of watermelon (Citrullus lanatus (thumb), Mansf) J. Appl. Chem. and Agric. Res. 5:48 -53. (Nigeria)


Fawusi, M. O. A., Uwah, D. F. and Vine, P. (1998). Effects of soil water table depths on the growth and yield of amaranthus, celosia and okra. Nig. J. Hort. Sc. 3: 22 -32. (Nigeria


Uwah, D. F. and Afangideh, U. M. (2000). Growth and yield response of cucumber (Cucumis sativus L.) to nitrogen and potassium fertilizers. Nig. Southeast J. of Agric. Econs. and Ext. 2 (1 and 2): 62-69. (Nigeria)


Uwah, D. F., Solomon, M. G. and Nya, F. I. (2003). Response of rainfed popcorn (zea mays Everta) to nitrogen and inter-row spacings in South Eastern rain forest of Nigeria. J. Appl. Chem. and Agric. Res. 9:21-29. (Nigeria)


Iwo, G. A. and Uwah, D. F. (2007). Efficacy of beniseed (Sesamum indicum) as trap crop to striga species (parasitic weed). Nig. J. of Weed Sc. 20:47-51. (Nigeria)


Nwagwu, F. A., Uwah, D. F., Iwo, G. A. and Nsemo, G. (2008). Effect of different seedbeds on weed control and the performance of okra (Abelmoschus esculentus (L) Moench) in the Calabar humid area. J. of Appl. Scs. 11 (1):7539-7550. (Nigeria)


Iwo, G. A. and Uwah, D. F. (2008). On-farm evaluation of groundnut varieties for seed and forage yields in southern guinea savannah of Nigeria. UNISWA Res. J. Agric. Scis. And Tech. 11 (2): 129-134. (Swaziland)


Uwah, D. F., Ahmed, M. K., Amans, E. B. and Chiezey, U. F. (2010). Nitrogen and phosphorus effects on the field performance of watermelon (Citrullus lanatus (thumb) Mansf). Journal of Agric. Biotech and Ecology. 3 (1): 10-22. (China)


Uwah, D. F., Nwagwu, F. A., and Iwo, G. A. (2010). Response of okra (Abelmoschus esculentus (L.) Moench) to different rates of nitrogen and lime on an acid soil. Intl. J. Agric. Scis. 2(2):14-22. (India)


Uwah, D. F., Iwo, G. A. Nwagwu, F. A., Amaefula, C. and Joseph, S. N. (2010). Effect of harvest frequency and nitrogen rates on growth and edible leaf yield of fluted pumpkin (Telfairia occidentalis Hook. F.) Journal of Applied Sciences 13(3): 9199-9214. (Nigeria)


Uwah, D. F., Iwo, G. A., Effa, E. B., Matthew, U. U. and Odinigwe, C. C. (2010). Growth and leaf yield of vegetable amaranth (Amaranthus cruentus L.) as affected by nitrogen and potassium fertilizers. J. Appl. Scis. 13 (2): 9176-9187. (Nigeria)


Effa, E. B. and Uwah, D. F. (2010). Varietal trial of cowpea (Vigna unguiculata L. walp) in Cross River State. Proc. 44th Annual Conf. Agric. Soc. Nig. Lautech Ogbomosho 2010, 880-884. (Nigeria)


Undie, U. L., Uwah, D. F. and Attoe, E. E. (2010). The response of late season maize/soybean intercropping to nitrogen in the humid environment of South Southern Nigeria. J. Agric. Forestry and Soc. Scis. 8(2):152-165. (Nigeria)


Uwah, D. F., Udoh, A. U. and. Iwo, G. A. (2011). Effect of organic and mineral fertilizers on growth and yield of cocoyam (Colocasia esculenta (L.) Schott) Int’l. J. Agric. Scis. 3(1):1-6. (India)


Uwah, D. F. and Iwo, G. A. (2011). Effectiveness of organic mulch on the productivity of maize (Zea mays L.) and weed growth. J. Anim. Plant Sci. 21(3):525-530. (Pakistan)


Uwah, D. F., Udoh, A. U., Okpara, D. A., Eka, M. J. and Asawalam, D. O. (2011). Growth and yield of cocoyam (Colocasia esculenta (L.) Schott) following soil amendment with poultry manure and rice husk. J. Agric, Biotech and Ecol. 4(2):1-10. (China)


Uwah, D. F., Eneji, A. E. and Eshiet, U. J. (2011). Organic and mineral fertilizers effects on the performance of sweet maize (Zea mays L. saccharata Strut.) In south eastern rainforest zone of Nigeria. Int’l J. Agric. Scis. 3(1):54-61. (India)


Uwah, D. F., Effa, E. B. and Ephraim, l. E. (2011). Productivity of maize/soybean mixture as influenced by crop arrangement in the humid environment of south eastern Nigeria. Journal of Applied Sciences 14(2):9863-9880. (Nigeria)


Effa, E. B., Uwah, D. F. and Iwara, E. B. (2011). Evaluation of some upland rice varieties for possible selection for rice growing areas in Cross River State, Nigeria. J. Applied Scis. 14(2):9749-9761. (Nigeria)


Iwo, G. A. Uwah, D. F. and Uko, A. E. (2011). Variation in agronomic performance and proximate composition of some ginger genotypes in the humid agro-ecology of Nigeria. J. Agric, Biotech and Ecol. 4(1):13-18. (China)


Uwah, D. F., Afonne, F. A. and Essien, A. R. (2011). Integrated nutrient management for sweet maize (Zea mays L. saccharata Strut.) Production in Calabar, Nigeria. Aust. J. Basic and Appl. Scis. 5(11):1019-1025. (Australia)


Uwah, D. F., Effa, E. B. and Agbanyim, I. K. (2011). Influence of nitrogen and phosphorus on the growth and yield of cucumber (Cucumis sativus L.) J. Sci. Engr. Tech. 18(3):10248-10269. (Nigeria)


Uwah, D. F., Ukoha, G. O., Akpabio, I. I. and Inyang, I. O. (2012). Response of garden egg (Solanum gilo Raddi) to farm yard manure and inorganic fertilizer. J. Sci. Engr. Tech. 19(1):10523-10532. (Nigeria)


Effa, E. B., Uwah, D. F. and Iwo, G. A. (2011). Lime and nitrogen fertilizer effects on growth and yield of popcorn on an Ultisol in South Eastern Nigeria. Int’l J. Adv. Scientific and Technical Res. 2(1):533-543. (India)


Effa, E. B., Uwah, D. F. and Ukeh, D. A. (2011). Yield response of popcorn (Zea mays L. var. Everta) to nitrogen and lime amendment in a south eastern rainforest environment of Nigeria. Am. J. Plant physiology, 6(6):304-311. (USA)


Undie, U. L., Uwah, D. F. and Attoe, E. E. (2012). Growth and development of late season maize/soybean intercropping in response to nitrogen and crop arrangement in the forest agro-ecology of South Southern Nigeria. Int’l J. Agric. Res., 1-16. (USA)


Uwah, D. F., Ukoha, G. O. and Iyango, J. O. (2012). Okra performance, soil and water conservation as influenced by poultry manure and organic mulch amendments. Journal of Food, Agriculture and Environment. 10(1):748-754. (Finland)


Undie, U. L., Uwah, D. F. and Attoe, E. E. (2012). Effect of intercropping and crop arrangement on yield and productivity of late season maize/soybean mixture in the humid environment of South Southern Nigeria. J. Agricultural Science. 4(4):37-50. (Canada)


Effa, E. B., Uwah, D. F., Iwo, G. A., Obok, E. E. and Ukoha, G. O. (2012). Yield performance of popcorn (Zea mays L. Everta) under lime and nitrogen fertilization on an acid soil. Journal of Agricultural Science. 4(10):12-19. (Canada)


Iwo, G. A., Ufot, E. U., and Uwah, D. F. (2012). Selection criteria for stem and tuber yields in cassava (Manihot esculenta crantz). Journal of American Science 8(12):1120-1124. (USA)


Uwah, D. F., Ogar, C. C. and Effa, E. B. (2012). Response of sweet maize (Zea mays L. saccharata) to poultry manure and row spacing in Uyo, Akwa Ibom State, Nigeria. In: Proceedings of the 8th Annual Conference of Organic Agriculture (OAPTIN), “UNICALORGANIC 2012”, University of Calabar, Nigeria, November 5-9, 2012, pp 1-5. (Nigeria)


John, N. M., Uwah, D. F., Iren, O. B. and Akpan, J. F. (2013). Changes in maize (zea mays l.) Performance and nutrients content with the application of poultry manure, municipal solid waste and ash composts. Journal of Agricultural Science 5(3):270-277. (Canada)


Uwah, D. F., Effa, E. B., Ekpenyong, L. E. and Akpan, I. E. (2013). Cassava (Manihot esculenta crantz) performance as influenced by nitrogen and potassium fertilizers in Uyo, Nigeria. Journal of Animal and Plant Sciences, 23(2):550-555. (Pakistan)


Uwah, D. F., Undie, U. L., John, N. M. and Ukoha, G. O. (2013). Growth and yield response of improved sweet potato (Ipomoea batatas (L.) Lam) varieties to different rates of potassium fertilizer in Calabar, Nigeria. Journal of Agricultural Science, 5(7):61-69. (Canada).


Uwah, D. F., Ogar, C. C. and Effa, E. B. (2013). Tillage method and N Effects on growth and yield of fluted pumpkin (Telfairia occidentalis F. Hook) in Calabar Cross River State, Nigeria. Int’l J. Applied Res. and Technology. 2(5):83-91. (USA)


Uwah, D. F. and Ogbonna, C. C. (2013). The effects of pig manure rates on the performance of two okra (Abelmoschus esculentus (L.) Moench) varieties in Calabar. In: Proceedings of the 47th National Annual Conference of the Agricultural Society of Nigeria, Fed. College of Ani. and Health Prod. Tech. Moor Plantation “Ibadan 2013”, November 4-8, 2013, pp 272-276 (Nigeria).


Uwah, D. F. and Okopedeghe, U. E. (2013). Effects of row-spacing and NPK fertilizer on agronomic performance of sweet maize (Zea may L. Saccaharata Strut). In: proceedings of the 1st National Annual Conference of Crop Science Society of Nigeria, Nsukka, September, pp142-148. (Nigeria).


Uwah, D. F. and Eyo, V. E. (2014). Response of sweet maize (Zea mays saccharata Strut) to number and rates of goat manure application in Calabar. In: Proceedings of the 2nd National Annual Conference of Crop Science Society of Nigeria (CSSN), “NSUKKA, 2017”, September 21-25th, pp 120-125. (Nigeria).


Uwah, D. F. Undie, U. L. and John, N. M. (2014). Comparative evaluation of animal manures on soil properties growth and yield of sweet maize (Zea mays L. saccharata Strut) Tropical Agric. 91(4): 220-234 (Trinidad).


Uwah, D. F. Ogar, C. C. and Akpan, R. J. (2014). Effects of poultry manure and plant population on soil properties and agronomic performance of sweet maize (Zea mays L. saccharata Strut) International Journal of Appl. Sci. and Tech. 4(4): 190-201


Uwah, D. F. Eyo, V. E. (2014). Effects of number and rate of goat manure application on soil properties, growth and yield of sweet maize (Zea mays L. saccharata Strut) Sustainable Agric. Res. 3(4): 75-83 (Canada)


Effa, E. B., Uwah, D. F. and Undie, U. L. (2014). Popping volume expansion and nutrition composition of rain-fed popcorn under liming and N fertilization. International Jour. of Appl. Res. And Tech. 3(10): 16-23 (USA)


Undie, U. L., Uwah D. F., Shiyam, J. O. and Effa, E. E. (2015). Nutrient status and ameliorating effects of poultry droppings on soil pH and sustainability production of garden egg. Jour. of Agric. and Sustainability 7(2): 128-142 (Australia).


Uwah, D. F. and Ogbonna, C. C. (2015). Influence of pig manure on soil properties, growth and yield of two varieties of okra (Abelmoschus esculentus (L.) Moench). European Jour. of Natural and Appl. Sci. 3(1): 20 -30. (UK)


Uwah, D. F., Effa, E. B. and Abam, P. O. (2016). Growth and yield response of maize (Zea mays L.) varieties of poultry manure in Calabar, Nigeria. European Jour. of Natural and Appl. Sci. 4(1): 1 -8. (UK)


Uwah, D. F., Obok, E. E. and Atim, E. S. (2016). Growth and edible leaf yield of fluted pumpkin (Telfairia occidentalis Hook F.) in response to poultry manure and NPK fertilizer in Calabar. In: proceedings of the 3rd National Annual Conference of Crop Science Society of Nigeria (CSSN), “NSUKKA, 2016”, September 27-30th, pp 519-525. (Nigeria).


Uwah, D. F., Ukoha, G. O. and Akpabio, I. I. (2016). Effect of goat manure and urea fertilizer on the performance of garden egg (Solanum gilo Raddi.) in Calabar. In: Proceedings 3rd National Annual Conference of Crop Science Society of Nigeria (CSSN), “NSUKKA, 2016”, September 27-30th, pp 526-530. (Nigeria).


David, G. S., Uwah, D. F., Effa, E. B. and Effiong, H. E. (2017). Genetic variability and heritability among selected genotypes of sweet potato (Ipomoea batatas (L) Lam) in Calabar. In: proceedings of the 4th National Annual Conference of Crop Science Society of Nigeria (CSSN), “UYO, 2017”, September 10-14, pp 573-580. (Nigeria).


Uwah, D. F. and David, G. S. (2017). Evaluation of five elite cassava (Manihot esculenta Crantz) varieties for stem and tuber yields selection in Calabar. In: Proceedings of the 4th National Annual Conference of Crop Science Society of Nigeria (CSSN), “UYO, 2017”, September 10-14, pp 248-253. (Nigeria).

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