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34 articles for “nitrate-nitrogen”
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Research ArticleOpen accessPhrase in the titleEVALUATION OF NITROGEN APPLICATION METHODS AND RATES WITH NUTRISPHERE-N ON SOIL NITRATE-NITROGEN IN SOUTHEASTERN COASTAL PLAINSPawel WiatrakNitrogen (N) application with Nutrisphere-N polymer may affect soil Nitrate-Nitrogen (NO3-N) movement in the soil. The objective was to evaluate two N application methods (all at planting and split application) and five N rates (0, 45, 90, 135 and 180 kg N ha-1) with Nutrisphere-N polymer on soil NO3-N in dryland corn (Zea mays L.) near Blackville, SC from 2010 … …American Journal of Agricultural and Biological Sciences, Vol. 9, Issue 1 · 23 Dec 2013 · 7,490 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleCOUPLED NITROGEN AND OXYGEN ISOTOPE STUDY OF NITRATE AT A RURAL UNLINED LANDFILL IN WESTERN VICTORIA, AUSTRALIAJohn W. Moreau, Andrew M. MinardUnderstanding of site-scale physical and chemical heterogeneities will inform remediation strategies for unlined rural landfills worldwide. The aim of this study was to characterize potential sources of nitrogen contamination to groundwater at an unlined landfill in rural western Victoria, Australia. Results revealed simultaneously high concentrations of both nitrate and ammonia within several wells, indicative of heterogeneous redox potentials within the … …American Journal of Environmental Sciences, Vol. 10, Issue 4 · 30 Jun 2014 · 7,607 accessesView PDFCite
Research ArticleOpen accessIn the keywordsEffect of In Vitro Nitrogen Nutrition to Phalaenopsis deliciosa Seedling GrowthChieh Wean Choong, Chin Hao Lim, Zherui Xiong, Siew Mee ChoongIn a continuous effort to conserve Phalaenopsis species, the optimization of a previously designed defined medium was carried out to understand the effect of in vitro nitrogen nutrition on Phalaenopsis deliciosa Rchb.f. In order not to alter the nutrient balance, macronutrient level instead of solely Nitrogen (N) was adjusted. Seedlings were obtained from in vitro germination and randomly inoculated on … …OnLine Journal of Biological Sciences, Vol. 16, Issue 1 · 16 Dec 2015 · 7,824 accessesView PDFCite
Research ArticleOpen accessIn the keywordsStudy on Nitrogen Concentration of Corn HybridsPravin Gautam, Dawn Gustafson, Zeno Wicks IIIProblem statement: Though Nitrogen (N) is vital in different physiological and developmental processes in plants and animals, it poses several environmental, nutritional and health problems, if present in excess amounts. Reduction in excess input of N into the soil, thereby reducing environmental problems and consequently nutritional and health problems, can be achieved by balancing their concentration in animal feed. Therefore, … …American Journal of Agricultural and Biological Sciences, Vol. 6, Issue 1 · 10 Mar 2011 · 8,273 accessesView PDFCite
Research ArticleOpen accessIn the keywordsPotential Air and Groundwater Pollution from Continuous High Land Application of Cheese WheyA.E. Ghaly, D.G. Rushton, N.S. MahmoudExperiments were performed, using eighteen 280 cm deep soil columns with 20 cm inside diameter, to determine the relative amounts of nitrogenous compounds leached and volatilized from soils receiving high application rates of cheese whey during two seasons. Three soils (loamy sand, sandy loam and sandy clay loam) and two cheese whey application rates (560 and 840 kg-N ha-1), that … …American Journal of Applied Sciences, Vol. 4, Issue 9 · 30 Sep 2007 · 7,277 accessesView PDFCite
Research ArticleOpen accessIn the keywordsPotential Environmental and Health Impacts of High Land Application of Cheese WheyA. E. Ghaly, N.S. Mahmoud, D.G. Rushton, F. ArabA laboratory scale experiment was carried out to study the transformation and transport of nitrogenous compounds in soils receiving high application rates of cheese whey (twice the nitrogen requirement for crops). The experimental apparatus consists of 36 soil columns constructed of 20 cm inside diameter PVC pipes. Three types of soil (sandy loam, loam and sandy clay loam) and three … …American Journal of Agricultural and Biological Sciences, Vol. 2, Issue 2 · 30 Jun 2007 · 8,155 accessesView PDFCite
Research ArticleOpen accessIn the keywordsTHE IMPACT OF THE POLYMER COATING NUTRISPHERE™ IN INCREASING NITROGEN USE EFFICIENCY AND CORN YIELDTimothy A. Smith, Ronnie W. Heiniger, Pawel WiatrakCurrently, it is estimated that 50 to 60% of the N applied fertilizer is actually utilized by the crop with the remaining N lost through leaching or denitrification. A three year study was conducted at eight locations in North Carolina to examine the impact of Nutrisphere™ on corn yield, optimum N rate, maximum yield, tissue N concentration, plant biomass and … …American Journal of Agricultural and Biological Sciences, Vol. 9, Issue 1 · 21 Dec 2013 · 8,037 accessesView PDFCite
Research ArticleOpen accessIn the keywordsEffect of Organic Based N Fertilizer on Dry Matter (Zea mays L.), Ammonium and Nitrate Recovery in an Acid Soil of Sarawak, MalaysiaSusilawati Kasim, Osumanu Haruna Ahmed, Nik Muhamad Ab. Majid et al.Problem statement: Exchangeable ammonium (NH4+) could be recovered by humic and fulvic acids from humic substances. The ability of these acids in fixing or retaining NH4+ has been demonstrated in many findings and reports. Both acids could affect the plant growth, nutrients uptake by enhancing photosynthesis rate and root growth among others. Thus, in this study, the effect of both … …American Journal of Applied Sciences, Vol. 6, Issue 7 · 31 Jul 2009 · 8,244 accessesView PDFCite
Research ArticleOpen accessIn the keywordsWastewater Treatment Using Horizontal Subsurface Flow Constructed WetlandS. Sarafraz, Thamer Ahamad Mohammad, Megat J. Megat M. Noor, A. LiaghatThe last few decades witnessed sharp focus on environment pollution and its impact on life in nature. Wetlands can be used for biological treatment of wastewater. Problem statement: Scarcity of water is considered as a global problem and Iran is one the countries which is facing water shortage problem. Pollution of water bodies restrict the availability of water for various … …American Journal of Environmental Sciences, Vol. 5, Issue 1 · 28 Feb 2009 · 8,788 accessesView PDFCite
Research ArticleOpen accessIn the keywordsSpatial Variability of Soil Inorganic N in a Mature Oil Palm Plantation in Sabah, MalaysiaAbdul Rahim Anuar, Kah Joh Goh, Tee Bee Heoh, Osumanu Haruna AhmedThe identification and understanding of soil factors influencing yield variability of oil palm enable their efficient management. Soil samples were therefore collected from a fertilizer response trial on oil palm to study the spatial inorganic N distribution and some selected soil chemical properties as affected by long-term N fertilizer applications. The experiment was conducted on mature oil palms grown on … …American Journal of Applied Sciences, Vol. 5, Issue 9 · 30 Sep 2008 · 7,686 accessesView PDFCite