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Tesis sobre el tema "Fertilizers"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 9 de junio de 2025

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1

Knowles, Tim C., Paul Artz, and Chip Sherrill. "Preplant Micronutrient Fertilizers for Cotton." College of Agriculture, University of Arizona (Tucson, AZ), 1999. http://hdl.handle.net/10150/197269.

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Micronutrient fertilizers including zinc, boron, copper, and manganese in their sulfate forms were broadcast applied and incorporated preplant to determine their effects on lint yield of upland cotton.

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2

Xie, Rongjing. "Animal manures and urea as nitrogen sources for corn production in Québec." Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=64482.

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3

Fathi, Ghodratollah. "Nitrogen responsiveness in barley." Title page, table of contents and abstract only, 1994. http://web4.library.adelaide.edu.au/theses/09PH/09phf2524.pdf.

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4

Fan, Mingxiang. "Urea and acidic phosphate interactions in fertilizer microsites and their effect on corn (Zea mays L.) yield and nutrient use efficiency." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=41334.

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Fertilizer applications of urea and triple superphosphate (TSP) suffer from low efficiency for corn production. Band or broadcast application of urea with acidic-P fertilizers may increase fertilizer efficiency. Urea and acidic-P fertilizer interactions in soil-fertilizer microsites were investigated using two Quebec soils. Adding acidic phosphates such as TSP and monoammonium phosphate (MAP) to urea reduced pH in microsites, urea hydrolysis, NH$ sb3$ volatilization, and increased soil NH$ sb4$- and NO$ sb3$-N contents. Ammonia loss decreased as P$ rm sb2O sb5$: urea-N ratios increased. Adding

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5

Smith, Leslie Owen 1960. "Effect of broadcast phosphorus on alfalfa yield and quality." Thesis, The University of Arizona, 1987. http://hdl.handle.net/10150/558068.

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6

Rafle, Abdirashid Dulane 1961. "NITRATE-NITROGEN AND TOTAL NITROGEN CONCENTRATION IN GRAIN SORGHUM (SORGHUM BICOLOR (L.) MOENCH) AS RELATED TO NITROGEN FERTILIZATION." Thesis, The University of Arizona, 1986. http://hdl.handle.net/10150/291249.

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7

Silva, Marciela Rodrigues da. "Modelo determinístico para estimação da adubação nitrogenada na cultura do milho para grãos e silagem." Universidade Tecnológica Federal do Paraná, 2012. http://repositorio.utfpr.edu.br/jspui/handle/1/221.

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Com o objetivo de avaliar a necessidade de adubação nitrogenada para a produção de grãos e silagem e um modelo matemático de estimação da produtividade potencial e deplecionada na cultura do milho, foi conduzido um experimento utilizando quatro híbridos de milho (AG30A86, AGN20A55, CD308 e AG30A91)avaliados em oito níveis de adubação nitrogenada. O experimento foi realizado na Universidade Tecnológica Federal do Paraná – PR e o delineamento experimental utilizado foi o de blocos ao acaso com parcelas subdivididas, sendo as doses de N (0, 60, 120, 180, 240, 300, 360 e 420 kg ha-1) aplicadas nas

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8

Fleming, Nigel Kevin. "Polyphosphates and microbial uptake of phosphorus : studies with soil and solution culture." Title page, contents and summary only, 1992. http://web4.library.adelaide.edu.au/theses/09A/09af598.pdf.

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9

Badra, Abdo. "Effects of potassium, magnesium, and sulfur fertilization on corn grain and silage yields in a high nutrient soil." Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=60449.

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The effects of added potassium, K, magnesium, Mg and sulfur, S on corn grain and silage yields were investigated in the field for two years.<br>Due to high nutrient soil, K, Mg and S had no effects on corn grain and silage yields. However, there were trends observed in the treatment effects that were significant. Added K at 240 kg K$ sb2$O/ha increased grain yield over zero kg K$ sb2$O/ha in 1983 and Mg at 60 kg/ha increased grain yield over 30 kg/ha in 1984. In silage, 240 kg K$ sb2$O/ha increased yield over 120 and zero kg K$ sb2$O/ha in 1984. Although there was no K by Mg interaction, there

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10

Campbell, Clayton Marshall Fulton John Patrick Zech Wesley C. "Evaluating spinner-disc technology for the distribution of poultry litter." Auburn, Ala, 2009. http://hdl.handle.net/10415/1581.

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11

Spivak, I. S., and L. P. Iarmak. "Methods of protection (pelleting) of nitrogen fertilizers." Thesis, Сумський державний університет, 2012. http://essuir.sumdu.edu.ua/handle/123456789/28676.

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12

Якушко, Сергій Іванович, Сергей Иванович Якушко, Serhii Ivanovych Yakushko, and I. S. Spivak. "Methods of protection (pelleting) of nitrogen fertilizers." Thesis, Видавництво СумДУ, 2012. http://essuir.sumdu.edu.ua/handle/123456789/25807.

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13

Yusran, Fadly Hairannoor. "Triple superphosphate and urea effects on availability of nutrients in the fertilizer band for soybean (Glycine max L.) growth with emphasis on molybdenum." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=69710.

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Fertilizer applications of urea and triple superphosphate (TSP) may affect availability of plant nutrients in the soil through alteration of soil pH and sorption-displacement effects. The objectives of this experiment were to evaluate urea and TSP effects on nutrient availability to soybean (Glycine max L.). Field experiments were carried out on three Quebec soils; a Chicot sandy clay loam (Gleyed Melanic Brunisol), an Ormstown silty clay loam (Luvic Gleysol) and a Ste. Rosalie clay (Humic Gleysol). Three levels of TSP (0, 40, 80 kg $ rm P sb2O sb5 ha sp{-1}),$ and three levels of urea (0, 25,

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14

Rajabipour, Ali. "Effects of Ca, K and water table depth on tomato mechanical properties." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=39984.

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Two series of tests were performed in summer 1993 and repeated in summer 1994 to investigate effects of potassium, calcium and water table depth on mechanical properties of tomato fruit. In the first group of tests five mechanical properties stress, strain, ER (ratio of stress to strain at break), energy and toughness were calculated from the force-deformation curve obtained by compression of pericarp disks taken from tomato fruits (cv New Yorker) at the breaker stage. In the second group of tests force, deformation and energy were obtained from puncture tests on whole tomato fruit. The textur

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15

Ippersiel, Denis. "The effect of foliar nitrogen fertilization on nitrogen distribution, yield and protein quality of forage corn /." Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=63798.

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16

Sprinkle, Amy Lyn. "Nutrient management on golf courses in Delaware." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file 1.01Mb, 155 p, 2005. http://wwwlib.umi.com/dissertations/fullcit/1428197.

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17

Maiga, Alpha S. "An economic analysis of nitrogen fertilization regimes in Virginia." Diss., This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-02022007-133634/.

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18

Ahmed, Sabah Kedar. "Yield, dry matter production, and nitrogen uptake of drip irrigated cotton." Diss., The University of Arizona, 1988. http://hdl.handle.net/10150/191143.

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The study consisted of two experiments conducted over two growing seasons. Urea ammonium nitrate was used as a source of N at rates of 50, 75, 100 and 150% of levels estimated to be ideal for maximum yield of cotton (Gossvpium hirsutum L.). The nitrogen fertilizer was applied through a drip irrigation system. The yield of seed cotton, flowering pattern, boll set, plant N uptake, and dry matter production were studied in relation to four N fertilizer rates and two plant populations in the 1984 study. Yield of seed cotton, plant N uptake and dry matter production were studied in relation to four

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19

Tekin, Elif. "Anaerobic Ammonium Oxidation in Groundwater Contaminated by Fertilizers." Thèse, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/23956.

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Anaerobic ammonium oxidation (anammox) is a pathway that has been known for almost 2 decades, but few studies have investigated its importance in natural groundwaters. This thesis investigated the presence of anammox cells and the groundwater geochemistry of 2 sites (Elmira and Putnam) in southwestern Ontario where groundwaters are contaminated with high levels of nitrate and ammonium. Fluorescence in situ hybridization (FISH) was used to quantify the relative abundance of anammox cells in these waters. Our results showed that anammox cells could be detected in many wells at both sites and tha

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20

Pandithagedara, Weeraratne Balasuriya. "Rubber urea composites as slow release nitrogen fertilizers." Thesis, University of Ulster, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243629.

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21

Shandyba, A. B., D. M. Shpetny, and A. V. Vasilushenko. "Production of environmental fertilizers by Ukrainian phosphate industry." Thesis, Sumy State University, 2016. http://essuir.sumdu.edu.ua/handle/123456789/46861.

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The fertilizer industry uses a wide range of production technologies, which are considered under engineering and environmental aspects. The traditional composition ration of N, P, K had changed to more using the additional microcomplex and organic components. The objective of this study was to evaluate agronomic and environmental effectiveness of the new mineral-organic generation fertilizers by comparing it with the other fertilizers such as the super phosphate (as P source) or ammophos of traditional trade marks.Technical feasibility of the phosphate fertilizer industry has been demonstrated

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22

Mupondi, Lushian Tapiwa. "The effects of goat kraal manure, sewage sludge and effective microorganisms on the composting of pine bark and the nutritional value of the composts." Thesis, University of Fort Hare, 2005. http://hdl.handle.net/10353/d1001008.

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23

Noellsch, Adam J. "Optimizing crop N use efficiency using polymer-coated urea and other N fertilizer sources across landscapes with claypan soils." Diss., Columbia, Mo. : University of Missouri-Columbia, 2008. http://hdl.handle.net/10355/5643.

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Thesis (M.S.)--University of Missouri-Columbia, 2008.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on September 12, 2008) Includes bibliographical references.

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24

More, Ketseemang. "Response of cabbage (Brassica Oleracea Var Capitata) transplants to nitrogen, phosphorus and potassium nutrition." Diss., Pretoria : [s.n.], 2006. http://upetd.up.ac.za/thesis/available/etd-09212007-133240.

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25

Woldetsadik, Kebede. "Shallot (Allium cepa var. ascolonicum) responses to plant nutrients and soil moisture in a sub-humid tropical climate /." Alnarp : Dept. of Crop Science, Swedish Univ. of Agricultural Sciences, 2003. http://epsilon.slu.se/a367.pdf.

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26

Zhang, Tiequan. "Chemical behavior of phosphorus over time in fertilized soils." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=34486.

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Fertilizer P accumulates in soils, with potential for movement to waterways, causing eutrophication. Fertilizer P reactions in monoculture corn (Zea mays L.) production over time will determine environmentally sound soil management practices. Soil P changes over time were determined on a Chicot sandy clay loam (Grey Brown Luvisol) and a Ste. Rosalie clay (Humic Gleysol). Fertilizer P was added at 44 and 132 kg P ha$ sp{-1}$ and to the Chicot soil only, manure containing 60 kg P for the first five years. Mehlich-3 (M3) extraction, soil P fractionation, $ sp{31}$P NMR analysis, P in leaching wat

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27

Feland, Calli. "Nitrogen Fertilizer Types and Application Timing on Hard Red Spring Wheat Productivity and Grain Protein." Thesis, North Dakota State University, 2017. https://hdl.handle.net/10365/29209.

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The balance of improving hard red spring wheat (Triticum aestivum L. emend Thell) yield while maintaining grain protein concentration continues to be a challenge in agriculture. The objective of the field research was to evaluate N fertilizer types, additives, rates, and application timing to find N management strategies that improved the efficiency of the applied N with regards to both grain protein and yield. Another aspect of this study was to determine if ground-based active sensor data can predict grain yield and/or protein content. Fertilizer treatments consisted of 2 application timings

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28

Chen, Jiansheng. "Effects of added nitrogen and potassium on selected soil properties and on yield and nutrient uptake of silage corn." Thesis, McGill University, 1991. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=59948.

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An incubation study was conducted to evaluate the effects of added urea, NH$ sb4$Cl, and KCl on fixation of NH$ sb4 sp{+}$ and K$ sp{+}$. A field study was carried out to observe the effects of rates and methods of added urea and KCl on the forms and distribution of N and K in soils, and on yields and nutrient uptake of silage corn.<br>Generally, the fixation of NH$ sb4 sp{+}$ was increased by added N but reduced by added K and vice versa. One exception was that added K increased NH$ sb4 sp{+}$ fixation when NH$ sb4$Cl was the N source. In comparison with NH$ sb4$Cl, urea resulted in greater K

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29

Solontsi, Mhlangabezi. "The response of maize to selected ratios of organic fertilizers mixed with inorganic fertilizers in Ndlambe Local Municipality, Eastern Cape, South Africa." Thesis, Nelson Mandela Metropolitan University, 2013. http://hdl.handle.net/10948/d1020902.

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The majority of small-scale farmers in the Eastern Cape apply inadequate quantities of manure, inorganic (NPK) fertilizer and Gromor as lone fertilizers or tend to mix manure or Gromor with chemical fertilizers for crops, without any scientific basis (Mkile, 2001). Hence this study – aimed at achieving effective and efficient use of chemical fertilizers, manure and Gromor, either as lone fertilizers or mixed with one another, in maize production – was established. A three-year dry land field experiment, arranged in a RCBD with 3 replicates where cattle manure, chemical fertilizer and Gromor we

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30

McArthur, David Albert James. "Strawberry and cranberry response to growth regulators and fertilizers." Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/26450.

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The growth and yield response of strawberry (Fragaria X annassa Duch.) and cranberry (Vaccinium macrocarpon Ait) to various growth inhibitors, but especially to paclobutrazol (PP333), and fertilizers were investigated in glasshouse and field studies. PP333 decreased vegetative growth in a rate-dependent manner in both strawberry and cranberry. PP333 delayed fruit ripening in strawberry and decreased fruit set and fruit size in cranberry. PP333 decreased pollen germination of strawberry. Soil residues of PP333 were biologically active when measured 11 weeks after application in the strawberry s

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31

Doerge, Thomas A., Jerome Pier, and Ted McCreary. "Watermelon Response to Soluable and Slow Release Nitrogen Fertilizers." College of Agriculture, University of Arizona (Tucson, AZ), 1992. http://hdl.handle.net/10150/214499.

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A field experiment with subsurface drip irrigated watermelon was conducted on a Casa Grande s.l. soil at the Maricopa Agricultural Center in 1992 to evaluate the field performance of two slow release nitrogen (SRN) fertilizers in comparison to a conventional soluble N source, urea, ammonium- nitrate (UAN-32). Single, preplant applications of 0, 100 and 200 lbs N/acre supplied from methylene urea (Nutralenes) or 100, 150 and 3(X) lbs N/acre from a methylene urea-ammonium sulfate mixture (MUAS) were evaluated in comparison to treatments of UAN-32 containing from 52 to 445 lbs N/acre made in five

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32

Van, Niekerk Corrie Maria. "Nitrogen dynamics in sewage sludge and commercial fertilizer enriched soils." Diss., University of Pretoria, 2004. http://hdl.handle.net/2263/24180.

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This study indicated that sewage sludge could be used as an alternative to commercial inorganic fertilizers. It is common practice in South Africa to use agricultural land for disposal of sewage sludge. The disposal of sludge must however be done in a responsible manner to avoid environmental pollution such as nitrate (NO3-) leaching. In South Africa strict guidelines exist regarding sludge disposal, and a maximum of 8 ton ha-1 year-1 (dry mass basis) sludge may be applied. This value was based on possible NO3- leaching, but no equivalent legislation exists for commercial fertilizer that could

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33

Norrish, Shane A., University of Western Sydney, of Science Technology and Environment College, and School of Environment and Agriculture. "Soil and water interactions controlling wheat crop response to phosphorus fertiliser in north-western New South Wales." THESIS_CSTE_EAG_Norrish_S.xml, 2003. http://handle.uws.edu.au:8081/1959.7/613.

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This thesis examines the response to P fertiliser by wheat crops growing in the vertosol soils of the low rainfall areas of the northern grain zone of eastern Australia. Farmers in this region depend on water accumulated from rainfall over a fallow period and stored in the subsoil to increase wheat grain yield beyond that normally achievable from in-crop rainfall and to decrease the production risks due to rainfall variability. The large variability in stored water, seasonal rainfall and subsoil properties result in extremely varied yield and yield responses to P fertiliser between seasons and

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34

Painchaud, Jacques. "L'azote du sol et la fertilisation de la pomme de terre." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0016/MQ37155.pdf.

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35

Morris, Jerry Whitaker. "Influence of nitrogen fertilization and leaf management on nitrogen use effeciency and agronomic performance of mammoth cultivars of flue-cured tobacco." Thesis, Virginia Tech, 1993. http://hdl.handle.net/10919/44303.

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36

Razmjoo, Ghalaie Khorshid. "Effect of potassium, sulfur, boron, and molybdenum fertilization on alfalfa production and herbage composition /." The Ohio State University, 1985. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487260859495673.

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37

Mohamed, Abdellatif Abdellatif 1956. "Response of cotton to N and water applied via a trickle irrigation system : growth, yield, and nutrient uptake." Diss., The University of Arizona, 1987. http://hdl.handle.net/10150/191128.

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The crop growth rate (CGR); the relative growth rate (RGR); seed yield; plant uptake of N, P, K, Ca, Mg, Fe, and Na; and the water use efficiency (WUE) were studied in relation to N fertilizer and water application rate interactions in trickle-irrigated cotton. Increasing water application rate significantly increased CGR, but no significant differences were detected among the RGR values at the various water levels. Nitrogen fertilizer additions significantly increased the CGR. Nitrogen and water applications significantly increased seed yield, however, the effect of the interaction between N

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38

Musa, Ali El-Toum Hassan. "Effects of molybdenum, zinc and rhizobium inoculation on growth and yield of groundnut (Arachis hypogaea L.)." Thesis, University of Reading, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.388472.

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39

Antoniadis, Vasileios. "Heavy metal availability and mobility in sewage sludge-treated soils." Thesis, University of Reading, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.298663.

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40

Zhang, Feng 1962. "Effects of N formulation, application rate, and application time on corn yield and quality in eastern Canada." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61039.

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An experiment was conducted to investigate the effects of N formulation, application rate, and application time on corn yield and quality under Eastern Canadian conditions, to evaluate the hypothesis that application of N will increase corn grain yield and protein concentration without decreasing the total energy content. Three N formulations, each with the rates of 90, or 180 kg ha$ sp{-1}$ were applied at different times. The results indicated that the grain yield increased with increasing N fertilizer rate and with increasing numbers of N application times. N application significantly incre

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41

Lee, Cheuk-hung. "The growth and mineral contents of vegetables treated with composed livestock waste /." Hong Kong : University of Hong Kong, 1994. http://sunzi.lib.hku.hk/hkuto/record.jsp?B20667395.

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42

Miransari, Mahabadi Mohammad Reza. "Development of a nitrogen soil test for fertilizer requirements for corn and wheat production in Quebec." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=23415.

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One must consider the effects of both soil N and fertilizer N, if rates of N-fertilizer application are to be optimized and NO$ sb3 sp-$ leaching into groundwater be controlled. Objectives were (1) to determine soil $ rm NO sb3 sp-$-N and NH$ sb4 sp+$-N, soil total N, and N fertilizer levels and corn and wheat yields; and, (2) to determine soil sampling times and depths for N analyses that correlated with yields and fertilizer N response. Soil samples taken at seeding and postseeding were analyzed for NH$ sb4 sp+$-N and NO$ sb3 sp-$-N, and for total N in 29 wheat sites and 44 corn sites fertil

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43

Absher, Karen Lynne. "Nitrogen utilization in tall fescue (Festuca arundinacea Schreb.) pastures fertilized with nitrogen or grown with alfalfa (Medicago sativa L.) or red clover (Trifolium pratense L.)." Thesis, Virginia Tech, 1989. http://hdl.handle.net/10919/44100.

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<p>Use of legumes as an alternative to nitrogen (N) fertilization in pasture management improves forage quality and animal performance and has been suggested to reduce the potential for environmental pollution. "Kentucky 3l" tall fescue fertilized with 160 kg N ha-1 yr-1 (split application) was compared to tall fescue grown with alfalfa or red clover in a 5-yr pasture experiment on a mixed Typic Hapludult. During yr 6, effects of N fertilization or the legume on soil N, forage N concentration, yield, botanical composition, N intake by esophageally fistulated steers grazing the pastures

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44

Митова, И. И., Ю. А. Ахмед та Р. Чутуркова. "Оценка факторов рабочей среды при производстве фосфорных удобрений". Thesis, Сумский государственный университет, 2013. http://essuir.sumdu.edu.ua/handle/123456789/48081.

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Сделана оценка факторов рабочей среды при производстве фосфорных удобрений в "Агрополихиме" АД – в цехе "Фосфорная кислота" и в цехе "Тройной фосфат". Ведущее место по своей выраженности занимают химические вредные факторы. Кроме этого, внимание направлено на физико- химический фактор пыли и физический фактор шума.

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45

Campbell-Nelson, Katie. "Assessment of ammonia volatility from fall surface-applied liquid dairy manure." Amherst, Mass. : University of Massachusetts Amherst, 2009. http://scholarworks.umass.edu/theses/273/.

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46

Kuraya-Ziyadeh, Natalie. "A Behavioral Analysis of Households Using Reclaimed Water in Irrigation: Case of Pinellas County, Florida." Scholar Commons, 2018. https://scholarcommons.usf.edu/etd/7319.

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In order to tend to the world’s dwindling freshwater supplies, sustainable alternative methods need to be integrated in order to keep up with the world’s increasing demand. Reclaimed water (RW) is one of the sustainable methods adopted by some Floridian cities such as Tampa, Tallahassee, and St. Pete that provide an alternative water source for non-potable uses. However, despite this alleviating effect RW has on freshwater supplies, it is crucial to recognize the potential harm it poses on neighboring waterbodies due to the residual contaminants it still contains, including Nitrogen (N) and Ph

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47

Lovas, Sarah. "Laboratory and Greenhouse Evaluation of FeEddha Fertilizers of Differing Quality." Thesis, North Dakota State University, 2013. https://hdl.handle.net/10365/27101.

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Commercial iron ethylene diamine di(hydroxyl phenyl acetic acid) (FeEDDHA) fertilizers containing the same Fe percent and applied at the same FeEDDHA rate control Fe deficiency chlorosis (IDC) differently due to differing ortho, ortho FeEDDHA (o,o-FeEDDHA) concentrations. This study: 1) determined the effect of o,o-FeEDDHA concentration on controlling IDC in soybeans (Glycine max L. Merr.); and 2) developed a soil-stability test using a simple colorimetric analysis method to determine the relative quality of soil-applied FeEDDHA fertilizers. A greenhouse experiment was conducted where nine FeE

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48

Walters, Cory G. "Producer opportunism and environmental impacts of crop insurance and fertilizer decisions." Pullman, Wash. : Washington State University, 2008. http://www.dissertations.wsu.edu/Dissertations/Fall2008/C_Walters_090808.pdf.

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49

Campbell, Richard John. "Effect of nitrogen fertilization on the physiological damage and subsequent recovery of mite-infested apple leaves /." This resource online, 1988. http://scholar.lib.vt.edu/theses/available/etd-04122010-083649/.

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50

Pholsen, Suradej. "Effects of nitrogen, potassium and organic matter on growth, chemical components and seed yields of IS 23585 forage sorghum cultivar." Thesis, University of Hertfordshire, 2003. http://hdl.handle.net/2299/14178.

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Resumen

Sorghum is considered to be of African origin and subsequently spread to most countries in tropical and subtropical regions. Sorghum has outstanding resistance against drought conditions. Grain and fodder from sorghum plants have been used for man's and animals' consumption respectively for many decades. Experiments were conducted on Yasothon soil series (Oxic Paleustults) in Northeast Thailand, this is considered a poor soil. Growth parameters of sorghum were affected most by nitrogen chemical fertiliser followed by potassium chemical fertiliser. An increase in nitrogen level increased growth

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