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Dissertations / Theses on the topic 'Fertilizers – Application'

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Published: 4 June 2021

Last updated: 1 February 2022

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1

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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2

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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3

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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4

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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5

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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6

Mezainis, Valdis Edgars 1947. "Nitrogen fertilizer and water application rate interactions in trickle irrigated cotton." Diss., The University of Arizona, 1985. http://hdl.handle.net/10150/191097.

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The yield, fruiting habits, plant nitrogen uptake, dry matter production, and boll and fiber properties were studied in relation to nitrogen fertilizer and water application rate interactions in trickle-irrigated cotton. Nitrogen applications did not significantly increase yields because of high initial soil nitrogen and nitrogen added with the irrigation water. Significant yield differences did exist between the 60% consumption use (CU) irrigation level and the 90% and 120% CU irrigation levels. The 60% CU level resulted in appreciable plant water stress and appreciably lower yields. Nitrogen

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7

Campbell, Allan J. "Design and evaluation of liquid swine manure injectors for potato nutrient placement." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0025/NQ50124.pdf.

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8

Shiflett, Melinda Cole. "Criteria signaling reapplication of controlled-release fertilizer for maximum growth of Ilex crenata Thunb. 'Helleri'." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-09122009-040325/.

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9

Schoeman, Stephanus P. (Stephanus Philippus). "Physiological measurements of daily daylight fertigated citrus trees." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/53000.

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Thesis (MScAgric)--University of Stellenbosch, 2002.<br>ENGLISH ABSTRACT: Daily daylight fertigation regimes (involvinq drip fertigation, on a daily basis, during the daylight hours) are becoming widely used in the South African citrus industry in the endeavor to enhance tree productivity. Such regimes could provide sensitive nutrient and moisture management, reducing plant stress in general as well as the response time to root-directed cultural activities. There is a need to evaluate the efficacy of daily daylight fertigation systems relative to conventional irrigation systems. Standa

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10

Rose, Terry. "Deep-placed phosphate fertiliser improves phosphorus uptake and seed yield of canola (Brassica napus L.) in a Mediterranean-type climate." University of Western Australia. Dept. of Soil Science and Plant Nutrition, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0237.

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In Mediterranean-type climates, topsoil frequently dries out during spring. Problems associated with reduced nutrient (P, K) availability in dry topsoil may be overcome by placing fertilisers deeper in the soil, where the soil is more likely to remain moist for longer periods as opposed to conventional fertiliser placement. Deep-P placement has resulted in significant yield improvements for lupin crops in Mediterranean environments because lupin crops generally require soil P supply during spring (throughout the flowering stage); in contrast, wheat yields have seldom improved with deep P place

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11

Gouveia, Aline Mendes de Sousa 1985. "Adubação potássica na produção e qualidade pós-colheita do rabanete /." Botucatu, 2016. http://hdl.handle.net/11449/136239.

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Orientador: Regina Marta Evangelista<br>Banca: Pablo Forlan Vargas<br>Banca: Eliane Aparecida Benato Rodrigues da Silva<br>Resumo: O rabanete pode ser cultivado entre o período de safra de outras culturas de ciclo mais longo, sendo uma opção interessante aos pequenos produtores rurais que enxergaram nesta hortaliça uma possibilidade de incremento na rentabilidade das suas áreas. Devido a poucas informações na literatura que mostrem os efeitos do potássio na produção, qualidade e nas características bioquímicas do rabanete, objetivou-se com este trabalho avaliar os efeitos da adubação potássica

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12

MOHAMED, IBRAHIM ELBASHIR. "EFFECTS OF PRE-PLANT APPLICATION OF NITROGEN FERTILIZER ON SYMBIOTIC NITROGEN FIXATION AND YIELD OF COWPEAS (VIGNA UNGUICULATA (L.) WALP.)." Diss., The University of Arizona, 1985. http://hdl.handle.net/10150/187957.

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The responses of two cowpea (Vigna unguiculata (L.) Walp.) cultivars inoculated with granular inoculum (a mixture of rhizobia) at different levels of applied nitrogen were evaluated. California Blackeye 5 (Ca5) and Knuckle Purple Hull (KPH) cowpeas were examined under field conditions for percent nodulation, nodule number, and nodule mass per plant, and nitrogenase activity at various times during the 1983 and 1984 growing seasons. Data were also obtained for shoot and root dry weights, seed yield, and protein content. Significant differences between inoculated and uninoculated plots were foun

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13

Fava, Erica. "The effects of the level and timing of nitrogen fertilizer application on red pepper production in Québec /." Thesis, McGill University, 1998. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=20819.

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The use of plastic mulches in producing red bell pepper (Capsicum annuum L.) is relatively new to Quebec and management techniques need to be further developed in terms of nitrogen (N) fertilization as well as insect and disease control. A research project was undertaken in the 1995 and 1996 growing seasons to compare peppers grown on black and on silver mulches, and fertigated using either the conventional method (weekly N-fertigated) or N-fertigated using diagnostic chlorophyll meter readings. Both fertigation treatments resulted in similar yields, although those fertilized according to the

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14

Koski, Anthony James. "The effects of timing of nitrogen application on quality, carbohydrate status, root growth, and thatch accumulation in 'Baron' Kentucky bluegrass (Poa pratensis L.) /." The Ohio State University, 1986. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487267024996817.

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15

Wilsdorf, Robert Ernst. "Evaluating the seasonal changes in calcium concentration and distribution in apple fruit after application of different calcium fertilisation strategies." Thesis, Stellenbosch : Stellenbosch University, 2011. http://hdl.handle.net/10019.1/17790.

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Thesis (MScAgric)--Stellenbosch University, 2011.<br>ENGLISH ABSTRACT: Localized calcium (Ca) deficiencies frequently develop independent from total Ca supply and total fruit Ca concentration. Bulk mineral analyses is therefore not completely suitable for determination of the susceptibility of fruit in developing Ca-linked fruit physiological disorders like bitter pit, as it supplies insufficient information regarding the spatial accumulation of Ca within the fruit. Additional Ca is applied either as soil or foliar applications, where soil applications are applied either after fruit set (pre-h

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16

DiPaola, Louis George. "Surface application vs. incorporation of limestone for no-till alfalfa production." Thesis, Virginia Tech, 1989. http://hdl.handle.net/10919/43897.

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No-till alfalfa (Medicago sativa L.) establishment is the only environmentally sound procedure for alfalfa production on erodable land. Surface limestone application is the only reasonable method of placement in no-til1 systems with pH below 6.5. The purpose of this research was to evaluate surface limestone application vs. incorporation throughout the plow layer for alfalfa production in acidic soils. In this study limestone placement included: 1. incorporation during tillage operations, 2. surface application after tillage and preparation of seedbed, and 3. surface application without t

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17

Kang, Choongkwan. "Evaluation of economic and water quality effects for variable rate application of nitrogen fertilizer /." free to MU campus, to others for purchase, 1996. http://wwwlib.umi.com/cr/mo/fullcit?p9821346.

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18

Atmodjo, Slamet. "Effect of different nitrogen sources, fertilizar rates, and application times on corn (Zea mays L.) yields and residual soil nitrate." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=69575.

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Nitrogen fertilizer use suffers from low efficiencies and increased residual NO$ sb3$ in the soil. The purpose of this study was to compare N fertilizer efficiency by a comparison of three N sources, three rates of N fertilization, and three application times of N fertilizer. Grain corn yields increased with increases in N rates, and split applications of N were superior to preplant incorporated (PPI) fertilizer. Grain N uptake was associated to grain yield and N uptake. Stover yields increased with increased N and varied with application times of N, but the effects were not as pronounced as w

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19

Mahama, George Yakubu. "Impact of cover crops and nitrogen application on nitrous oxide fluxes and grain yield of sorghum and maize." Diss., Kansas State University, 2015. http://hdl.handle.net/2097/18939.

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Doctor of Philosophy<br>Department of Agronomy<br>P. V. Vara Prasad<br>Leguminous cover crops systems have been envisaged as a critical component of sustainable agriculture due to their potential to increase soil productivity through cycling of carbon (C) and nitrogen (N) in agricultural systems. The objectives of this study were to evaluate the performance of leguminous summer cover crops; cowpea [Vigna unguiculata (L.) Walp.], pigeon pea [Cajanus cajan (L.) Millsp], sunn hemp (Crotalaria juncea L.) and double-cropped grain crops; grain sorghum [Sorghum bicolor (L.) Moench] and soybean [Glyci

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Cantin, Jean. "The environmental risks linked to different manure application periods /." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=99326.

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More intensive production of hogs and cattle in Quebec during the past decade has benefited local economies, but led to over-fertilization of agricultural soils and eutrophication of waterways. Provincial ministries responded to this issue by developing regulations to control manure applications. The objective of this thesis was to determine the environmental risk associated with applying farm manure in the late fall. Spreading manure in fall after harvesting corn was a common practice for many agricultural producers in Quebec, but this period is now viewed as very risky, having more negative

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21

Bajracharya, Keshari. "Corn responses to high levels of copper application as copper rich pig manure." Thesis, Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/91157.

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The use of copper (Cu) in pig production to stimulate growth and improve feed efficiency is presently being questioned due to the potential environmental hazards associated with the repeated disposal of the resulting Cu rich manure in agricultural land. Results of field experiments conducted on three diverse Virginia soils indicated that the long-term application of Cu as either copper sulfate or Cu rich pig manure, even at high application rates (average application rate for 9 years was 108 metric tons of manure ha⁻¹ year⁻¹ or 32 kg Cu ha⁻¹ year⁻¹), had no adverse effects on corn yields. Copp

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22

Jakkula, Vijay S. "Synthesis of zeolites and their application as soil amendments to increase crop yield and potentially act as controlled release fertilizers." Thesis, University of Wolverhampton, 2005. http://hdl.handle.net/2436/93299.

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Zeolites have been used in agriculture since the 1960s, due to the effectiveness of these crystalline microporous solids as soil amendments for plant growth, their cation exchange capacity (CEC) and slow-release fertilizer properties. Most work on slow-release fertilizers has focused on natural Clinoptilolite, Phillipsite and Chabazite. The aim of this study was to synthesize zeolites, study their effectiveness as soil amendments and their ability to act as controlled release fertilizers to decrease nitrate leaching. Nitrate pollution of groundwater is a major agro-environmental concern. The z

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23

Santana, Cleverton Tiago Carneiro de [UNESP]. "Comportamento de milho (Zea Mays L.) e propriedades físicas do solo, no sistema plantio direto, em resposta a aplicação de fertilizante organomineral." Universidade Estadual Paulista (UNESP), 2012. http://hdl.handle.net/11449/86402.

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Made available in DSpace on 2014-06-11T19:22:16Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-03-16Bitstream added on 2014-06-13T18:48:46Z : No. of bitstreams: 1 santana_ctc_me_botfca.pdf: 439755 bytes, checksum: e679859c91574c2de49be49c6a9834cb (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Esta pesquisa foi conduzida com o objetivo de avaliar a resposta agronômica de Zea Mays L. à aplicação de fertilizante organomineral, aplicado via tratamento de sementes e foliar, também utilizando-se de metodologias para avaliação das raízes por meio de coleta e

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Mpabanga, Nkosi. "The effect of phosphorus fertilizer application on growth, biomass and nutritive value of Pigeon pea (Cajanus cajan (L.) Millsp.) varieties in Alice, South Africa." Thesis, University of Fort Hare, 2017. http://hdl.handle.net/10353/6180.

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Low soil fertility has been identified to be among the major causes of low pasture quantity and quality. Scarcity of high quality forage mainly during the dry season threatens animal productivity in some areas of South Africa, thus the need for identifying livestock feed alternatives. Pigeon pea is a woody legume that has continually been an important shrub in agroforestry and can provide protein-rich livestock feed during times of shortage. Soil fertility to support the production of pigeon pea can be enhanced by application of fertilisers. Therefore, this study was carried out firstly, to de

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Grunwald, Dennis [Verfasser]. "Effects of the application of biochar and organic fertilizers as well as temperature on soil carbon and aggregate dynamics / Dennis Grunwald." Kassel : Universitätsbibliothek Kassel, 2017. http://d-nb.info/1155423321/34.

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Duchsherer, Christopher Joseph. "On the Profitability of UAS-Based NDVI Imagery for Variable Rate Nitrogen Prescriptions in Corn and Wheat in North Dakota." Thesis, North Dakota State University, 2018. https://hdl.handle.net/10365/28747.

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This study examines the grower’s decision to invest in precision agriculture technologies especially in-season variable rate nitrogen applications based on NDVI data collected from UAVs. NDVI, yield, soil, and other field data were collected from multiple corn and wheat fields located throughout North Dakota. Each field was divided into management zones to determine profitability of utilizing the technology based on in-season nitrogen applications for the grower’s field practice, high, low, and no applications. Results show that using the NDVI data collected from UAVs can be profitable when th

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Thurston, Molly Adair. "Identification of phosphate solubilizing bacteria and evaluation of their application with insoluble phosphorus fertilizers to soils from certified organic orchards affected by replant disease." Thesis, University of British Columbia, 2013. http://hdl.handle.net/2429/44949.

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Replant disease (RD) affects the growth and establishment of young fruit trees in old orchard soils. Organic management strategies are needed as an alternative to chemical controls. Improved phosphorus (P) nutrition to stimulate root growth and improve tree establishment is a well-established strategy; however, only insoluble Rock Phosphate (RP) and Bone Meal (BM) inputs are available to Canadian organic growers. The ability of specific plant growth promoting rhizobacteria to solubilize phosphate may improve P availability and its uptake in young apple trees, replanted into inoculated orchards

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Silva, Marcelo José da 1987. "Processo de aplicação de fluidos em profundidade com mínima mobilização do solo." [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/256796.

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Orientadores: Paulo Sérgio Graziano Magalhães, Henrique Coutinho Junqueira Franco<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Agrícola<br>Made available in DSpace on 2018-08-22T22:40:59Z (GMT). No. of bitstreams: 1 Silva_MarceloJoseda_M.pdf: 5007523 bytes, checksum: e5da7d0fac06c856f453f7f1131c1a62 (MD5) Previous issue date: 2013<br>Resumo: O objetivo deste trabalho foi o desenvolvimento de um processo para aplicação localizada de adubo líquido em cana-soca na camada subsuperficial do solo. Para tanto, foi desenvolvido um protótipo virtual de um dis

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Galiano, Norma Graciela. "Soil nitrate and ammonia levels as affected by no-till and conventional tillage, monoculture corn and soybean, corn-soybean and corn- soybean-alfalfa rotations, and added N." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=27319.

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Corn (Zea mays L.) production under monoculture and conventional tillage systems may land to soil degradation and nitrate (NO$ sb3 sp-$) pollution of surface and groundwater. This study evaluated the impact of no-till and conventional tillage, monoculture corn and soybean, corn-soybean rotations and corn-soybean-alfalfa rotations, and three fertilizer N rates applied to monoculture corn or soybean, and corn in rotation, on soil NO$ sb3$-N and NH$ sb4$-N levels. Experimental sites were a Ste-Rosalie clay (Humic Gleysol) and an Ormstown silty clay loam (Humic Gleysol). Results obtained from fall

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Hans, Ralston Ronald. "Initial growth responses to controlled release fertilizer application at establishment of commercial forestry species in South Africa." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/85609.

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Thesis (MScFor)--Stellenbosch University, 2013.<br>ENGLISH ABSTRACT: In South Africa fertilizer applications at establishment is a common practice in the forestry industry. Recommendations are based on past research with conventional sources (CV) and as a result there have only been slight improvements in additional plantation production over recent years. The objective of this study was to investigate initial stand responses in terms of leaf are index (LAI), foliar nutrient content, biomass index (BI) and volume growth to the application of controlled release fertilizers (CRF) at re-establish

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Santana, Cleverton Tiago Carneiro de 1988. "Comportamento de milho (Zea Mays L.) e propriedades físicas do solo, no sistema plantio direto, em resposta a aplicação de fertilizante organomineral /." Botucatu : [s.n.], 2012. http://hdl.handle.net/11449/86402.

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Orientador: Maria Helena Moraes<br>Banca: Sérgio Lázzaro de Lima<br>Banca: Sandro Roberto Brancalião<br>Resumo: Esta pesquisa foi conduzida com o objetivo de avaliar a resposta agronômica de Zea Mays L. à aplicação de fertilizante organomineral, aplicado via tratamento de sementes e foliar, também utilizando-se de metodologias para avaliação das raízes por meio de coleta e análise de imagens. Para tal, foi realizado um trabalho em área de plantio direto, em Latossolo Vermelho distroférrico, textura argilosa, na Fazenda Experimental Lageado da Faculdade de Ciências Agronômicas - Universidade Es

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Smedley, Kristi Olson. "Effect of application of fluidized bed combustion residue to reclaimed mine pastures on forage yield, composition, animal performance and mineral status." Diss., Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/49810.

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Gettier, Stacy W. "Corn response to long-term application of CuSO₄, ZnSO₄ and Cu-enriched pig manure." Diss., Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/49779.

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César, Fábio Ricardo Coutinho Fontes. "Efeito de enxofre elementar na eficiência de fosfatos naturais." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/11/11140/tde-13082012-101131/.

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É amplamente conhecida a importância do fósforo (P) para a obtenção de boa produtividade de culturas. Sabe-se, também, que a matéria prima para produção de adubos fosfatados é um recurso escasso e não renovável. Utilizações adequadas e alternativas que busquem melhorias da eficiência das fontes de P são de grande importância para o manejo da fertilização fosfatada. Os fosfatos naturais (FNs) podem ser fontes alternativas aos fosfatos acidulados para adubação fosfatada. Entretanto, faz-se necessário buscar opções para melhorar a eficiência dessas fontes, sendo uma delas a aplicação junto com en

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Rissi, Bruno Felipe. "Produção animal em sistema de integração lavoura-pecuária em função de intensidade de pastejo e antecipação de adubação nitrogenada." Universidade Tecnológica Federal do Paraná, 2015. http://repositorio.utfpr.edu.br/jspui/handle/1/2343.

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CNPq; CAPES<br>A integração lavoura-pecuária permite uma diversificação de culturas no sistema e aumento na produtividade por unidade de área, o que confere maior renda ao produtor e eficiência no uso de insumos. A sucessão aveia preta consorciada com azevém vem sendo amplamente utilizada nesse sistema. Contudo a maioria dos produtores não aplica fertilizantes na pastagem pois considera que a ocorrência de efeito residual da adubação realizada não é eficiente para cultura sucessora. O objetivo deste trabalho foi identificar o efeito residual da aplicação de adubação nitrogenada realizada na cu

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Kaefer, João Edson. "Resposta da canola a fontes, doeses e parcelamento de nitrogênio, em Toledo PR." Universidade Estadual do Oeste do Paraná, 2012. http://tede.unioeste.br:8080/tede/handle/tede/1480.

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Made available in DSpace on 2017-07-10T17:40:57Z (GMT). No. of bitstreams: 1 Tese_2012_Joao_Edson_Kaefer.pdf: 1393414 bytes, checksum: fdf2b5e5d88064ab53a8cf4b503d44bd (MD5) Previous issue date: 2012-06-25<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>The canola term is an acronym for Canadian Oil Low Acid and was adopted as the standard to indicate low levels of erucic acid and glucosinolates. In general, tropical soils are poor in available nitrogen (N) because of the low stocks of organic matter, requiring the external supply of N to meet the demands of the culture.

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Nurmakhanova, Mira. "Essays on fall fertilizer application." [Ames, Iowa : Iowa State University], 2008.

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Stroehlein, Jack, Karen Kebler, and Paul Forrest. "Response of Guar to Fertilizer Applications." College of Agriculture, University of Arizona (Tucson, AZ), 1986. http://hdl.handle.net/10150/200554.

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Fertilizer studies were carried out with guar in the field and greenhouse over two seasons. Response to N was found in terms of plant growth and bean yield. With very low available soil P, fertilizer P increased the P concentration in guar plants but not bean yields. Zinc increased yields in the greenhouse only on the soil with the lowest available Zn.

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Sunderlage, Brent. "LATE APPLICATION NITROGEN ON CORN IN SOUTHERN ILLINOIS AND SOIL PROPERTIES AFFECTING AMMONIA VOLATILIZATION FROM UREA FERTILIZER." OpenSIUC, 2017. https://opensiuc.lib.siu.edu/theses/2154.

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AN ABSTRACT OF THE THESIS OF BRENT C. SUNDERLAGE, for the Master of Science degree in Plant, Soil, and Agricultural Systems, presented on March 8, 2017, at Southern Illinois University Carbondale. TITLE: LATE APPLICATION NITROGEN ON CORN IN SOUTHERN ILLINOIS AND SOIL PROPERTIES AFFECTING AMMONIA VOLATILIZATION FROM UREA FERTILIZER MAJOR PROFESSOR: Dr. Rachel L. Cook In corn (Zea mays L.) production systems, typical nitrogen fertilization occurs either before planting or after crop emergence, as late as the V6 stage. Since the majority of nitrogen uptake does not occur until V10 through R1,

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Gardner, B. R., and T. C. Tucker. "Effect of Phosphorus Fertilizer Application on Cotton Yields." College of Agriculture, University of Arizona (Tucson, AZ), 1985. http://hdl.handle.net/10150/204087.

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Woodward, Timothy Ryan. "Evaluation of Urea Ammonium-Nitrate Fertilizer Application Methods." Thesis, Virginia Tech, 2011. http://hdl.handle.net/10919/76800.

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Increased nitrogen (N) costs and environmental concerns have created a need to reevaluate current sidedress N application recommendations for corn. Injection of Urea Ammonium-Nitrate (UAN) may reduce N-loss via ammonia (NH?) volatilization compared to current surface application methods. This study evaluated injection and surface-banding application techniques of UAN in two ways: (1) by conducting a laboratory experiment where NH?-N loss was measured from UAN applied by both techniques across varying residue covers; and (2) by performing a field study where the application methods were compare

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Hansel, Fernando Dubou. "Eficiência de fontes fosfatadas aplicadas a lanço e em linha na cultura da soja manejada sob semeadura direta." Universidade Federal de Santa Maria, 2013. http://repositorio.ufsm.br/handle/1/5571.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>The sources of soluble phosphate fertilizers present differences in their chemical and structural composition coming from the increasing production and consumption demand in the last decades. The product of the reactions between fertilizer and soil, resulting from the composition of phosphate fertilizers, are different, influenced by soil‟s chemical and textural characteristics. With the popularization of the no-till system and intensification of the superficial management, the type of application of phosphate fertilizer also arise

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Stroehlein, J. L., W. C. Hofmann, S. K. Ahmed, and Cathy Creekmore. "Response of Surface Drip Irrigated Cotton to Fertilizer Application." College of Agriculture, University of Arizona (Tucson, AZ), 1986. http://hdl.handle.net/10150/219761.

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The 1985 and 1986 Cotton Reports have the same publication and P-Series numbers.<br>Fertilizer nitrogen rates and the addition of phosphorus, potassium and zinc were studied in a drip irrigated field at Eloy. Response to nitrogen was found with the optimum rate being about 170 lbs/acre although higher rates tended to increase yields. Significant response to P and K were not found, but there appeared to be a response to zinc. Yields were below desired levels because of problems with obtaining a good stand and infestations of cotton rust and root rot.

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Calabria, Luciane. "Blendas a base de biopolímeros para liberação controlada de agroquímicos." reponame:Repositório Institucional da UCS, 2010. https://repositorio.ucs.br/handle/11338/454.

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A incorporação e encapsulamento de fertilizantes em blendas poliméricas são métodos que podem ser usados para reduzir perdas e minimizar a poluição ambiental. Neste trabalho, blendas de Proteína Isolada de Soja (SPI) e Poli(ácido lático) (PLA) foram usadas para incorporar o fertilizante NPK (nitrogênio, fósforo e potássio) granular. A influência de concentração dos biopolímeros na mistura foi examinada por Calorimetria exploratória Diferencial (DSC), Análise Termogravimétrica (TGA) e Microscopia Eletrônica de Varredura (SEM). A incorporação efetiva dos nutrientes no solo é dependente do contro

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Gildow, Marie C. "Evaluating Fertilizer Application Practices to Reduce Phosphorus Discharge from the Maumee River." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1437400849.

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FULTON, JOHN PATRICK. "A SPATIAL MODEL FOR EVALUATING VARIABLE-RATE FERTILIZER APPLICATION ACCURACY." UKnowledge, 2003. http://uknowledge.uky.edu/gradschool_diss/248.

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The popularity of variable-rate technology (VRT) has grown. However, the limitations and errors ofthis technology are generally unknown. Therefore, a spatial data model was developed to generate "asapplied"surfaces to advance precision agricultural (PA) practices. A test methodology based on ASAEStandard S341.2 was developed to perform uniform-rate (UR) and variable-rate (VR) tests to characterizedistribution patterns testing four VRT granular applicators (two spinner spreaders and two pneumaticapplicators). Single-pass UR patterns exhibited consistent shapes for three of the applicators with

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Hulm, Sharon C. "Fertilizer nitrogen transformations following urea application to an afforested ecosystem." Thesis, University of Aberdeen, 1987. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU010535.

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Fertilizer nitrogen transformations in two Sitka spruce stands in northeast Scotland were studied using 15N-labelled (2.5 atom % 15N) urea at a rate equivalent to 160 kg N ha-1. The use of urea fertilizer resulted in accelerated growth of the tree crowns, and higher concentrations of total N in foliage, twigs and new wood. There was no fertilizer effect observed for bark. Despite a positive growth response by the trees to fertilizer N, only an estimated 17% of applied-N was utilized by the tree biomass. Application of urea-N resulted in a reduction in the leaching of inorganic N and certain ca

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Silvertooth, J. C., G. W. Thacker, J. E. Malcuit, T. A. Doerge, and S. H. Husman. "Upland and Pima Cotton Response to Banded Fertilizer Applications, 1990." College of Agriculture, University of Arizona (Tucson, AZ), 1991. http://hdl.handle.net/10150/208629.

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Two field experiments were established in Arizona in 1990 to evaluate the effects of banded phosphorus (P) fertilizer on cotton. Experiments involved both Upland (Gossvpium ltirsutum, L.) and American Pima (Q. barbadense L.). Banded applications of P fertilizerwere made with placement of the concentrated band of fertilizer 6 in. below and 3-6 in. to the side of the zone of seed placement. The P₂O₅ was supplied from 10-34-0. Rates of applied P ranged from 0 to 160 lb P₂O₅ /acre. In one experiment, treatments consisting of 5 to 10 lbs. Zn/acre were included in all possible combinations with the

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Clark, Lee J., and Bryant R. Gardner. "Effect of Nitrogen Fertilizer Application on Cotton Yields, Safford Agricultural Center." College of Agriculture, University of Arizona (Tucson, AZ), 1986. http://hdl.handle.net/10150/219792.

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The 1985 and 1986 Cotton Reports have the same publication and P-Series numbers.<br>A soil depleted of nitrogen by cropping with Sudan grass and removing all the residues was planted to Upland (DP 90) and Pima (S-6) cotton. Nitrogen was added in the form of urea at three different stages of plant growth, applying a total of 0, 50 or 100 pounds of nitrogen. The yield of lint from DP 90 was increased where nitrogen was added; however, there were no differences in yield with the timing nor total amount of nitrogen added. In the case of S-6, fertilizer nitrogen did not increase yield.

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Stovall, Jeremy Patrick. "Growth and Physiological Responses to Fertilizer Application in Clonal Loblolly Pine." Diss., Virginia Tech, 2010. http://hdl.handle.net/10919/38684.

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More than 20 million clonal loblolly pines have been planted throughout the southeastern United States. Fertilizer has been applied to more than 6.5 million hectares of plantations to alleviate deficiencies of nitrogen and phosphorus that limit growth. Because cloning loblolly pine in large numbers has only become possible in the last decade, it is unknown how clones may respond differently to fertilizer application. Growth, growth efficiency, and biomass partitioning responses to fertilizer application were investigated among 25 clones planted in the Virginia Piedmont. Closely related clones

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