Effect of Poultry Manure and Nitrogen, Phosphorus, and Potassium (15:15:15) Soil Amendment on Growth and Yield of Carrot (Daucus carota)
This present experiment was carried out during the 2012 cropping season, at the Farming for the Future Experimental Field of the University for Development Studies, Nyankpala Campus in the Northern Region of Ghana. The objective of the experiment was to determine the carrot growth and yield responses to poultry manure and N.P.K (15:15:15). Six treatments (Control (no amendment), 20 t/ha poultry manure (PM), 40 t/ha PM, 70 t/ha PM, 35 t/ha PM + 0.11t/ha N.P.K and 0.23 t/ha N.P.K) with three replications for each were laid in a Randomized Complete Block Design (RCBD). Data were collected on plant height, number of leaves per plant, canopy spread, root diameter, root weight, and root length. Microsoft Excel and Genstat Statistical Package (9th edition) were used for the data analysis. The treatment means were compared by using Least Significant Difference at 10%. Generally, the results showed that there were no significant differences (P>0.1) among the treatments with respect to number of leaves per plant, root diameter, root weight, and root length. However, significant differences occurred among plant heights and canopy spreads. Plant height treated with 40 t/ha PM at the fourth week after planting and canopy spread at eight weeks after planting and ten weeks after planting by 70 t/ha PM and 20 t/ha PM respectively showed significant difference (P<0.1). The study recommended that any of the amended treatments can be applied at their recommended rates to plots for carrot production, since there were no significant differences among the treatments.
 Arteca, R.N. (2006). Introduction to Horticultural Science, Delmar Cengage Learning, New York, 514 pp.
 Babatola, J. O. and Oyedunmade, E. F. A., 1992. Influence of organic manures and urea on nematode pest of Celosia argenta. Nematologia Mediterranean, 20: 237- 239 pp
 Christopher, E. P. (2005), Introductory horticulture. Biotech Book, New Delhi, 482 pp.
 Edwards, D. R. and Daniel, T.C (1992). Environmental Impacts of On-Farm Poultry Waste Disposal: A review, Bioresouce Technology, vol 41, 9-33 pp.
 Greenland, D. J., Gregory, P. J. and Nye, P. H. (1998). Land Resource: On the Edge of the Malthusian Precipice. CAB International. The Royal Society, New York. 89-115 pp.
 Holttum, R. E. and Ivan, E. (1997). Gardening in the Tropics. Times Edition, Singapore, 384 pp.
 McSorley, R. and Frederick, J. J. (1999). Nematode population fluctuations during decomposition of specific organic amendments. J. Nematol., 31: 37-44 pp.
 Mijindadi, N. B and Erhabor. P. O. (1998). “Rural poverty and agricultural resources utilization: Implications for the Nigerian environment.” In Osuntogun, A. ed, Foundation for Environmental Development and Education in Nigeria (FEDEN). 124-131 pp.
 Mufwanzala, N. and Dikinya, O., (2010). Impact of poultry manure and its associated salinity on the growth and yield of spinach (Spinacea oleracea) and carrot (Dauscus carota). International Journal of Agriculture and Biology.,12:489 – 494 pp.
 NARR (Nyankpala Agricultural Research Report), (1995), Nyankpala Experimental Station and Crop Research Institute, Ghana. 4-41pp.
 Norman, J.C (1992). Tropical vegetable crops. Arthur Stockwell Ltd, London. 252 pp.
 Rai, N. and Yadav, D.S. (2005). Advances in Vegetable Production. Researchco Book Centre, New Delhi. 995 pp.
 Savannah Agricultural Research Institute (2004). Annual report for the year 2004, Nyankpala. 22 pp.
 Sharangi, A. B and Paria, N. C. (1995). Growth, Yield and Qualitative responses by carrots to varying levels of nitrogen and potassium. Horticulture Journal, 8 (2),: 161-164 pp
 Sinnadurai, S. (1992), Vegetable Production. Asempa publisher, Box 919 Accra. 208 pp.
 Tindall, H. D. (1983). Vegetables in the tropics. The MacMillam Press Ltd, Houndmills, Basingstoke, and Hampshire. 133-135 pp.
 Ware, G.W and McCollum, J.P. (1975), Producing Vegetable Crop, The Interstate Printers and Publisher, Inc. Illinois, 599 pp.
 White, J. M. (1992). “Carrot yield when grown under three soil water concentration.” Hort. Science, 27, No. 2, 251-252 pp.
 www.worldcarrotmuseum.com (accessed July, 2012).
 Xu, H. L., Wang, R., Xu, R., Mridha M.A.U and Goyal, S., (2005). Yield and quality of leafy vegetables grown with organic fertilizations. Acta Hort., 627: 25-33 pp.