Effect of Nitrogen Fertilizer on Growth, Quality and Yield of Mrenda (Corchorus olitorius) Morphotypes in Kenya

Abdelhamid, M.T, Selim E.M, EL-Ghamry A.M, 2011. Integrated effects of bio and mineral fertilizers and humic substances on growth, yield and nutrient contents of fertigated cowpea (Vigna unguiculata L.) grown on sandy soils. Journal of Agronomy 10, 34-39.

Abukutsa O.M.O. 2010. African indigenous vegetables in Kenya: Strategic Repositioning in the Horticultural Sector. Inaugural Lecture, Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya.

Abukutsa-Onyango M.O. 2003. The Role of African Indigenous Vegetables in Poverty Alleviation in Kenya. Proceedings of the 1^st Procta International Workshop, 23^rd -25^th September, 2002, Nairobi, Kenya. pp 269.

Aliniaeifard S, Tabatabaei S. 2010. Use of Chlorophyll Meter for Nitrogen Management and Recommendation of Optimum Nitrogen Concentration in Soilless Culture of Lily. Floriculture and Ornamental Biotechnology4, 63-67.

Brady N.C, Weil R.R. 2002. The Nature and Properties of Soils. Thirteenth Ed. Prentice Hall Publishing, New Jersey, USA. pp 900.

Chadha M.L, Oluoch M.O. 2003. Home based vegetable gardens and other strategies to overcome micronutrient malnutrition in developing countries. Food, Nutrition and Agriculture, FAO 3, 17-23.

Chadha M.L, Oluoch M.O, Silue D. 2007. Promoting Indigenous Vegetables for Health, Food Security and Income Generation in Africa. Acta Horticulture, (ISHS) 762, 253. 

Ekwu L.G, Okporie E.O. 2002. Effect of Plant Spacing and Nitrogen Fertilizer on the Growth and Yield of Pepper (Capsicum annum L.). Agro Science 3(2), 22-26.

Fermont A, Benson T. 2011. Estimating Yield of Food Crops Grown by Smallholder Farmers, A Review in the Uganda Context. International Food Policy Research Institute, Discussion Paper. pp 68.

Furumoto T, Wang R, Okazaki K, Hasan A, Ali M.I, Kondo A, Fukui H, Wang R. 2002.Antitumor promoters in leaves of Corchorus olitorius and Corchorus capsularis. Department of biochemistry and food science, faculty of Agriculture, Kagawa 761-0795, Japan. Food science and technology research 8, 239-243.

Goyal R, Sharma S, Gill B.S. 2012. Variability in the nutrients, anti-nutrients and other bioactive compounds in soybean [Glycine max (L.)Merrill] genotypes. Journal of Food Legumes 25, 314-320.

Hamayun M, Khan S.A, Khan A.L, Shinwari Z.K, Ahmad N, Kim Y.H, Lee I.J. 2011. Effect of foliar and soil application of nitrogen, phosphorus and potassium on yield components of lentil. Pakistan. Journal of Botany 43, 391-396.

IPGRI. 2000. Comparative Nutrient Content of Selected Exotic and Indigenous Vegetables, International Plant Genetic Resources Institute, Rome, Italy.

Kamwaga J, Nafuma L, Maina M, Langat P, Ooro P, Macharia P, Mwangi H, Njuguna M, Amadi D, Osoo J, Moraa L, Banda P, Bor P, Waweru J, Kirui, P. 2005. Crop Management. In: KARI (2005) Crop Production Handbook for Wheat, Oil and Horticulture, KARI, Njoro, Kenya.

KARI - Kenya Agricultural Research Institute. 2012-2013. Annual Report, Government Printers, Nairobi, Kenya.

Keller G.B. 2004. African Nightshade, Eggplant, Spider flower et al.- Production and consumption aspects of traditional vegetables in Tanzania from the farmer’s point of view. Goettingen: Georg-August Universitaet.

Khandakar A.L, Van der Vossen H.A.M. 2003. Corchorus L. In: Brink M, Escobin R.P. (Editors). Plant Resources of South-East Asia No 17. Fibre plants. Backhuys Publishers, Leiden, Netherlands. pp 106-114.

Kochhar S.L. 2016. Economic Botany: A Comprehensive Study. Cambridge University Press. ISBN 9781316675397.

Kothari C. 2004. Methods and Technique. In: Research Methodology, 2nd ed.; New Age International Publisher: New Delhi, India. p 31.

Kwenin W.K.J, Wolli M, Dzomeku B.M. 2011.Assessing the nutritional value of some African indigenous green Leafy Vegetables in Ghana. Journal of Animal and Plant Sciences. 10(2), 1300-1305.

Masinde P.W, Onyango C.A, Abukutsa-Onyango M, Wesonga J.M, Ojiewo C.O, Agong S.G. 2010.Response of leaf yield and nutritive value of African Nightshade (Solanum villosum) genotype to nitrogen application. African Journal of Horticultural Science 3, 34-47        

Mauyo L.W, Anjichi V.E, Wambugu G.W, Omunyini M.E. 2008.Effect of nitrogen fertilizer levels on fresh leaf yield of spider plant (Cleome gynandra) in Western Kenya. Academic Journals, Scientific Research and Essay 3(6), 240-244.

MOA- Ministry of Agriculture. 2012. Local and Export Vegetable growing Manual, Government Printers, Nairobi, Kenya.

MOA - Ministry of Agriculture. 2013. Annual report, Government Printers, Nairobi, Kenya.

Muhammad S, Shinkafi M.A. 2014. Ethnobotanical survey of some medicinal important leafy vegetables in North Western Nigeria. Journal of Medicinal Plant Research 8(1), 6-8

Musotsi A.A, Sigot A.J, Onyango, M.O.A. 2008. The Role of Home gardening in Household Food Security in Butere Division of Western Kenya. African Journal of Agriculture Nutrition and Development 8(4), 375.

Odhiambo Z, Oluoch M. 2008. African leafy vegetables come out of shade. Global Facilitation Unit for underutilized species, World Vegetable Centre, Arusha. Tanzania.  

Opabode J.T, Adegbooye O.C. 2005. Application of Biotechnology for the Improvement of Nigerian Indigenous Leafy Vegetables. African Journal of Biotechnology 4(3), 138.

Opiyo A.M. 2004. Effect of nitrogen application on leaf yield and nutritive quality of black nightshade (Solanum nigrumL.). Outlook on Agriculture 33, 209-214.

Pavlou G.C, Ehaliotis C.D, Kavvadias V.A. 2007. Effect of organic and inorganic fertilizers applied during successive crop seasons on growth and nitrate accumulation in lettuce. Scientia Horticulturae 111, 319-325.

Roberts J. 2009. Solving Kenya’s food crisis, one indigenous crop at a time. Daily Climate News and Analysis.

Rubaihayo E.B. 2003. The Contribution of Indigenous Vegetables to Household Food and Security. In: Proceedings of African Crop Science Conference 3, 1337.  

Ruibaihayo J.E, Kakonge E, Kawongo J, Hart T, Mugisha J. 2002. Mechanisms for Sustainable Vegetable Production and Utilization of Indigenous Vegetables in Uganda. In: Proceedings of African Crop Science Conference 2, 133.

Schippers R.R. 2000. African indigenous vegetables: An overview of the cultivated species. Chatham, UK. Natural Resources Institute / ACP-EU Technical Centre for Agricultural and Rural Cooperation.

Shiundu K.M, Oniang’o R.K. 2007. Marketing African Leafy Vegetables: Challenges and Opportunities in the Kenyan Context. African Journal of Food Agriculture, Nutrition and Development.

Tan K.H. 1996. Soil Sampling, Preparation and Analysis. Marcel Dekker Inc New York, USA.

Van Averbeke W, Juma K.A, Tshikalange T.E. 2007. Yield Response of African Leafy Vegetable to Nitrogen, Phosphorous and Potassium. The Case of Brassica rap L. Var. chinenesis and Solanum retroflexum. Dun Water S.A. 33(3), 352.

Van Rensburg J, Vorster H.J, Bezuidenhout C.C. 2004.  Traditional African Vegetables can combat hunger, disease & malnutrition. Agriculture Research Council, Pretoria, South Africa.

Voster H, Jansen Van Rensburg J, Van Zijl W.S, Venter S.L. 2007. The Importance of Traditional Leafy Vegetables in South Africa, African Journal of Food, Agriculture, Nutrition and Development 7(4), 80.

Walingo A, Lungaho C, Shibaro S. 2001. Market Survey of Indigenous Vegetables in Western Kenya. In: African Crop Science Conference Proceedings Vol. 5 Lagos Nigeria. pp 665.    

Wang Z.H, Zong Z.Q, Li S.X, Chen B.M. 2002. Nitrate accumulation in vegetables and its residual in vegetable fields. Environmental Science23, 79-83.

Weinberger K, Msuya J. 2004. Indigenous Vegetables in Tanzania – Significance and Prospects. Shanhua Taiwan. AVRDC – The World Vegetable Center, Technical Bulletin No.31, AVRDC Publication 04-600. pp 14.

Zebarth B.J, Drury C.F, Tremblay N, Cambouris A.N. 2009. Opportunities for improved fertilizer nitrogen management in production of arable crops in eastern Canada: A review. Canadian Journal of Soil Science 89, 113-132.