@Research Paper
<#LINE#>Influence of nitrogen levels on Dracaena sanderiana L. varieties in dry zone, Sri Lanka<#LINE#>Srikrishnah @S.,Peiris @S.E.,Sutharsan @S. <#LINE#>1-7<#LINE#>1.ISCA-RJAFS-2018-014.pdf<#LINE#>Department of Crop Science, Faculty of Agriculture, Eastern University, Vantharumoolai, Sri Lanka@Department of Crop Science, Faculty of Agriculture, University of Peradeniya, Peradeniya, Sri Lanka and Dept. of Biotechnology, Faculty of Science, Horizon Campus, Malabe, Sri Lanka@Department of Crop Science, Faculty of Agriculture, Eastern University, Vantharumoolai, Sri Lanka<#LINE#>17/4/2018<#LINE#>22/8/2018<#LINE#>An experiment was carried out to determine the effect of graded nitrogen levels on three dracaena (Dracaena sanderiana L.) varieties  viz. ‘Gold’, ‘Victory’ and ‘White’ at the Eastern University, Sri Lanka . Plants were grown at 70% shade house. Nitrogen doses used were 0.5, 1.0, 1.5, 2.0 g/plant/ month. Completely randomized design was used as experimental arrangement. Measurements were taken at monthly interval and data were analyzed statistically. The results revealed that dracaena varieties showed highest performances in measured growth parameters such as plant height, leaf area and plant biomass at 1.0 and 1.5 g/plant/month nitrogen levels significantly (p<0.05). Lower (0.5g/plant/month) and higher (2.0 g/plant/month) nitrogen levels reduced the growth of dracaena varieties. Polynomial regression analysis showed that, optimum nitrogen level for maximum biomass production of dracaena varieties is in the range of 1.11 – 1.15 g/plant/month.  Therefore, this experiment concluded that, nitrogen in the range of 1.11 – 1.15 g/plant/month is optimum for the growth of dracaena varieties in the dry zone, Sri Lanka at 70% shade level.<#LINE#>Senevirathne G.A.S.S., Kumari D.L.C. and Disanayake L. (2007).@Productivity improvement of foliage plant Dracaena sanderiana (Ribbon Dracaena) variety “White”.@Proceedings of the Sri Lanka Association of Advancement of Science, 63(1), 186.@No$Jimenez S. and Lao M.T. (2005).@Influence of nitrogen form on the quality of Diffenbachia amoena ‘Tropic Snow’.@HortScience, 40(2), 386-390.@Yes$Srikrishnah S., Peiris S.E. and Sutharsan S. (2012).@Effect of shade levels on leaf area and biomass production of three varieties of Dracaena sanderiana L. in the dry zone of Sri Lanka.@Tropical Agricultural Research, 23(2), 142-151.@Yes$Sharma R.K., Nayital S.C. and Thakur J.R. (1989).@Response of barley to nitrogenous fertilizer – A study of limited availability.@Fertilizer Marketing News, 20, 11-15.@Yes$Blumenthal J.M., Baltensperger D.D., Cassman K.G., Mason S.C. and Pavlista A.D. (2008).@Importance and effect of nitrogen on crop quality and health.@In Nitrogen in the Environment (Second Edition) 51-70.@Yes$Salisbury F.B. and Ross C.W. (1992).@Plant Physiology (4th Edition).@Wadsworth Publishing Company, Belmont, California.@No$Hussain A., Anjum F., Rab A. and Sajid M. (2006).@Effect of nitrogen on the growth and yield of asparagus (Asparagus officinalis).@Journal of Agricultural and Biological Science, 1(2), 41-47.@Yes$Letham D.S. (1994).@Cytokinins as phytohormones-sites of bioynthesis, translocation, and function of translocated cytokinin.@Cytokinins chemistry, activity, and function, 57-80.@Yes$Yong J.W., Wong S.C., Letham D.S., Hocart C.H. and Farquhar G.D. (2000).@Effects of elevated [CO2] and nitrogen nutrition on cytokinins in the xylem sap and leaves of cotton.@Plant Physiology, 124(2), 767-780.@Yes$Haynes R.J. (1986).@Mineral Nitrogen in the Plant-Soil System Academic Press.@Orlando, Florida.@Yes$Britto D.T. and Kronzucker H.J. (2002).@NH4+ toxicity in higher plants: a critical review.@Journal of Plant Physiology, 159(6), 567-584.@Yes$Ramachandra C. (1982).@Studies on the effect of dates of planting with different levels of nitrogen  and  phosphorus on growth and flower production  of  China  aster (Callistephus  chinensis  Nees.).@cv.  Ostrich  Plume.  (Unpublished M.  Sc.  (Agri.)  Thesis). University of Agricultural Sciences, Bangalore, India.@Yes$Chapman S.C. and Barreto H.J. (1997).@Using a chlorophyll meter to estimate specific leaf nitrogen of tropical maize during vegetative growth.@Agronomy Journal, 89(4), 557-562.@Yes$Uhart S.A. and Andrade F.H. (1995).@Nitrogen deficiency in maize: I. Effects on crop growth, development, dry matter partitioning, and kernel set.@Crop Science, 35(5), 1376-1383.@Yes$Squire G.R., Ong C.K. and Monteith J.L. (1987).@Crop growth in semi-arid environment.@In: International Pearl Millet Workshop, 7-11 April 1986, Patancheru.@Yes$Boroujerdnia M. and Ansari N.A. (2007).@Effect of different levels of nitrogen fertilizer and cultivars on growth, yield and yield components of romaine lettuce (Lactuca sativa L.).@Middle Eastern and Russian Journal of Plant Science and Biotechnology, 1(2), 47-53.@Yes$Duble R.L. (1996).@Turfgrasses: Their Management and Use in the Southern Zone (Second Edition).@Texas A&M University Press, Texas.@Yes$Evans J.R. (1989).@Photosynthesis and nitrogen relationships in leaves of C3 plants.@Oecologia, 78(1), 9-19.@Yes$Sinclair T.R. and Horie T. (1989).@Leaf nitrogen, photosynthesis, and crop radiation use efficiency: a review.@Crop Science, 29(1), 90-98.@Yes$Murata Y. (1961).@Studies on the photosynthesis of rice plants and cultural significance.@Bull. Natl. Inst. Agric. Sci. (Japan) Ser. D., 9, 1-169.@Yes$Murata Y. (1969).@Physiological responses to nitrogen in plants.@In: Physiological Aspects of Crop Yield. Eastin J.D., Haskins F.A., Sullivan C.Y. and van Bavel C.H.M. (Eds.), 235-263. American Society of Agronomy, Madison, Wisconsin.@Yes$Tisdale S.L., Nelson W.L., Beaton J.D. and Havlin J.L. (2003).@Soil Fertility and Fertilizers (5th Edition).@Prentice-Hall of India, New Delhi.@No$Pompelli M.F., Martins S.C.V., Celin E.F., Ventrella M.C. and DaMatta F.M. (2010).@What is the influence of ordinary epidermal cells and stomata on the leaf plasticity of coffee plants grown under full-sun and shady conditions?.@Brazilian Journal of Biology, 70(4), 1083-1088.@Yes$Takebe M., Ishihara T., Matsuna K., Fojimoto J. and Yoneyama T. (1995).@Effect of nitrogen application on the content sugars, ascorbic acid, nitrate and oxalic acid in spinach (Spinacia oleracea L.) and kamatsuna (Nrasica compestris L.).@Japanese Journal of Soil Science and Plant Nutrition, 66, 238-246.@Yes$Najm M.R., Hadi H.S., Fazeli F., Darzi M.T. and Shamorady R. (2010).@Effect of utilization of organic and inorganic nitrogen source on the potato shoots dry matter, leaf area index and plant height, during middle stage of growth.@International Journal of Agricultural and Biological Sciences, 1, 26-29.@No$Tabatabaie S.J. and Malakouti M.J. (1997).@Studies on the effect of the N, P, and K- fertilizers on the potato yield and nitrate accumulation in potato tuber.@Iranian Journal of Soil and Water Research, 11, 25-30 (in Farsi).@No$Rincon L., Pellicer C. and Saez J. (1998).@Effect of different nitrogen application rates on yield and nitrate concentration in lettuce crops.@Agrochemia, 42, 304-312.@Yes$Onasanya R.O., Aiyelari O.P., Onasanya A., Oikeh S., Nwilene F.E. and Oyelakin O.O. (2009).@Growth and yield response of Maize (Zea mays L.) to different rates of nitrogen and phosphorus fertilizers in southern Nigeria.@World Journal of Agricultural Sciences, 5(4), 400-407.@Yes
<#LINE#>Community based environmental impact assessment of the university of Ibadan International Conference Centre<#LINE#>Chukwu @O.,Ogunsanwo @O.Y.,Rotowa @O.J.,Donald-Amaeshi @U.A.,Ebeniro @S.T.,Ilelakinwa @G.A.,Fasiku @O.O.,Agboola @F.O.,Adeniran @T.,Ibeh @K.G.,Alade @O. <#LINE#>8-12<#LINE#>2.ISCA-RJAFS-2018-020.pdf<#LINE#>Faculty of Renewable Natural Resources, University of Ibadan, Ibadan, Nigeria@Faculty of Renewable Natural Resources, University of Ibadan, Ibadan, Nigeria@Faculty of Renewable Natural Resources, University of Ibadan, Ibadan, Nigeria@Faculty of Renewable Natural Resources, University of Ibadan, Ibadan, Nigeria@Faculty of Renewable Natural Resources, University of Ibadan, Ibadan, Nigeria@Faculty of Renewable Natural Resources, University of Ibadan, Ibadan, Nigeria@Faculty of Renewable Natural Resources, University of Ibadan, Ibadan, Nigeria@Faculty of Renewable Natural Resources, University of Ibadan, Ibadan, Nigeria@Faculty of Renewable Natural Resources, University of Ibadan, Ibadan, Nigeria@Faculty of Renewable Natural Resources, University of Ibadan, Ibadan, Nigeria@Faculty of Renewable Natural Resources, University of Ibadan, Ibadan, Nigeria<#LINE#>3/7/2018<#LINE#>18/8/2018<#LINE#>Community based impact assessment provides basic and up to date information on the extent to which an infrastructural project affects the environment and livelihood of community dwellers. This study assessed the environmental impacts of situating University of Ibadan International Conference Centre (UIICC), Nigeria on its adjoining communities in with a view to identifying the effects of UIICC building on the livelihood of its neighboring communities. The data for this study was obtained through oral interview, questionnaire administration and visual observation analysed using descriptive statistics. One hundred and fifty (150) questionnaires were randomly distributed within three communities (Abadina, Orogun and Barika) around the UIICC. The results of this study showed that majority the respondents (54%) had lived within and around the university environment for more than eight (8) years and 46.6% had obtained tertiary education. However, they are all involves in different occupation including students. This research reveals that during events in the conference centre, business activities within the communities increases, temporal employment and tight security are provided. Furthermore, deforestation and soil degradation were among the observed negative impacts of UIICC to the environment. Landscaping, planting of avenue tree and ornamental plants within and outside the conference centre and provision of good drainage systems are some of the mitigative measures recommended by this study. Hence, employment of youths from the communities was identifies as key to preventing future conflict between the University and the communities.<#LINE#>Adibe E.C. and Essaghah A.A. (1999).@Environmental Impact Assessment in Nigeria.@Principles, Procedures and Practice. Immaculate Publications Ltd, Nigeria, 2, 1-182.@Yes$Anago I. (2002).@Environmental Impact Assessment as a tool for Sustainable Development: The Nigerian experience: sustainability.@FIG XXII International Congress Washington, D.C. USA., 1-13.@Yes$Report (2018).@The International Conference Centre University of Ibadan.@(UIICC)URL: http://uiicc.ui.edu.ng/index.html accessed: 23/March/2018.@No$Popoola L. and Akande J.A. (2001).@An integrated approach to forestry sector impact assessment in Nigeria.@Journal of Tropical Forest Resources, 17, 42-56.@Yes$Chukwu O.O., Gunsanwo O.Y., Danladi W.A. and Oluyinka O.M. (2018).@Environmental Impact Assessment of University of Ibadan International Conference Centre on the Adjoining forest.@Tropical Plant Research, 5(2), 160-166.@Yes$Wilcox B.A. (1995).@Tropical forest resources and biodiversity: the risks of forest loss and degradation.@Unasylva, 46(181), 43-49.@Yes$FAO (2010).@Food and Agriculture Organisation: Socio-Economic Functions of Forest Resources.@Global Forest Resources Assessment, 119-146.@No