Dissertations / Theses on the topic 'Plants, Effect of nitrogen on; Wheat'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Plants, Effect of nitrogen on; Wheat.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
Yu, Shaobing. "Winter wheat nitrogen management in south coastal British Columbia." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/29888.
Full textLand and Food Systems, Faculty of
Graduate
Lotfollahi, Mohammad. "The effect of subsoil mineral nitrogen on grain protein concentration of wheat." Title page, table of contents and summary only, 1996. http://web4.library.adelaide.edu.au/theses/09PH/09phl882.pdf.
Full textSarvestani, Zeinolabedin Tahmasebi. "Water stress and remobilization of dry matter and nitrogen in wheat and barley genotypes /." Title page, table of contents and summary only, 1995. http://web4.library.adelaide.edu.au/theses/09PH/09phs251.pdf.
Full textWang, Guangyao (Sam), Kevin Brunson, Kelly Thorp, and Mike Ottman. "Cultivar and Nitrogen Effects on Yield and Grain Protein in Irrigated Durum Wheat, 2012." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2013. http://hdl.handle.net/10150/312150.
Full textOttman, M. J., T. A. Doerge, and E. C. Martin. "Late Season Water and Nitrogen Effects on Durum Quality, 1996." College of Agriculture, University of Arizona (Tucson, AZ), 1997. http://hdl.handle.net/10150/202456.
Full textSilva, Cristiano Lemes da. "Caracterização de genótipos brasileiros de trigo para eficiência de uso do nitrogênio e qualidade industrial em multi-ambientes." Universidade Tecnológica Federal do Paraná, 2013. http://repositorio.utfpr.edu.br/jspui/handle/1/453.
Full textCaracterizar a presença de variabilidade genética quanto a eficiência de uso de nitrogênio (EUN) e identificar ambientes que maximizem a produtividade e qualidade industrial de grãos é de fundamental importância para a sustentabilidade e competitividade da cultura do trigo no Brasil. O primeiro experimento objetivou avaliar os níveis de desoxinivalenol (DON) e caracterizar cultivares de trigos brasileiros recentemente disponibilizados para cultivo, quanto à eficiência de uso do N (EUN) em dois locais de cultivo (Pato Branco-PR e Coxilha-RS), na safra agrícola de 2011. Os experimentos foram conduzidos em Pato Branco-PR e Coxilha-RS, na safra agrícola de 2011 em delineamento experimental de blocos casualizados com três repetições e analisados de forma conjunta. A micotoxina DON foi detectada em 97.23% das amostras variando de 200 a 4140 μg kg-1, com valores médios de 1058 μg kg-1 em Pato Branco e 1357μg kg-1 em Coxilha. De um total de 108 amostras, 17% representadas pelos cultivares IPR Catuara TM, IPR 144, BRS Tangará e BRS 220, apresentaram níveis de DON superiores ao limite tolerado pela Anvisa para o ano de 2012. Também foi identificado variabilidade genética para a eficiência de uso do nitrogênio pelos grãos (EUNg – 47.6 a 81.1 kg/kg) e índice de colheita de nitrogênio (ICN – 71.3 a 84.6%), com destaque para os cultivares Mirante, Quartzo, F. Cristalino, F. Raízes e CD 150. O rendimento de grãos dos cultivares de trigo atuais associou-se positivamente com a maior produção de biomassa total (0,85** e 0,82**) em ambos os locais. O segundo experimento objetivou avaliar a capacidade geral e específica de combinação de componentes da EUN em cruzamentos dialélicos e investigar possíveis associações com caracteres agronômicos. Seis genitores e 15 populações segregantes F2 foram avaliadas a campo em delineamento de blocos casualizados com três repetições. Efeitos gênicos aditivos e não-aditivos afetaram os componentes da EUN. Os genitores Mirante, Valente e BRS Tangará apresentaram os maiores valores de CGC para componentes da EUN. O índice relativo de clorofila B foi significativamente associado com o RG (0,49*), peso de mil grãos (0,44*) e EUNg (0,50*), indicando que esse caractere pode ser utilizado seleção indireta de progênies superiores em gerações precoces. Por último 29 linhagens e 10 cultivares de trigo foram testadas em 11 locais de cultivo no Paraná nas safras agrícolas 2010 e 2011, com o objetivo de selecionar linhagens de trigo e identificar ambientes de testes ideais para a maximização do rendimento de grãos e qualidade de panificação. Foram usadas as metodologias em gráfico biplot AMMI e GGE para a análise dos dados. Em 2010, Nova Fátima e Ventania forma ambientes representativos e discriminantes para rendimento de grãos (RG). Em 2011, Apucarana e Astorga destacaram-se como ambientes ideais para seleção de genótipos para qualidade de panificação. A análise de genótipo-ideal indicou as linhagens BIO-08528 e BIO-08228 para RG e concentração protéica dos grãos (CPG), respectivamente. Em 2011, as linhagens BIO-10161 e BIO-10141 foram superiores para RG e qualidade de panificação e devem ser selecionadas. A CPG e o teste de sedimentação SDS correlacionaram-se entre si (r=0,61**) e foram moderadamente associados com a forca de glúten(r=0,49** e 0,74**), indicando que podem ser empregados na seleção indireta para qualidade de panificação em programas de melhoramento genético de trigo.
To characterize the genetic variability as the nitrogen use efficiency (NUE) and identify environments that maximize grain yield and baking quality is of essential importance for the competitiveness and sustainability of crop wheat in Brazil. The first experiment was objective to evaluate the levels of deoxynivalenol (DON) and to characterize Brazilian wheat cultivars recently release and available for cultivation, as the efficiency of use of N (EUN) in two growing locations (Pato Branco, Paraná and Coxilha-RS), in 2011 crop season. The experimental design was a randomized block with three replications and analyzed jointly. The mycotoxin DON was detected in 97.23% of samples ranging from 200 to 4140 μg kg-1, with mean values of 1058 μg kg-1 in Pato Branco and 1357 μg kg-1 in Coxilha. From a total of 108 samples, 17% represented by cultivars IPR Catuara TM, IPR 144, BRS 220 and BRS Tangará, had DON levels above the limit tolerated by ANVISA for 2012 crop season. Additionally, was identified genetic variability for nitrogen use efficiency by grains (NUEg – 47,6 to 81,1 kg/kg) and nitrogen harvest index (NHI – 71,3 to 84,6%), highlighting the cultivars Mirante, Quartzo, F. Cristalino, F. Raízes and CD 150. Grain yield of current brasilian wheat cultivars was positively associated with total biomass production (0,85 ** and 0,82 **) at both locations. The objective of the second experiment was to evaluate the general ability combination (GCA) and specific ability (SCA) of NUE components and investigate possible associations with agronomic traits in diallel crosses. Six parents and 15 F2 segregating populations were evaluated in the field in a randomized block design with three replications. Additive and non-additive genetic effects influenced the expression of the components of NUE. The parents Mirante, Valente and BRS Tangará showed the highest CGC values for components of NUE. The relative relative chlorophyll B was significantly associated with the RG (0,49*), thousand kernel weight (0,44*) and NUEg (0,50*), indicating that this traits can be used for indirect selection of superior genotypes in early generations. Lastly, 29 wheat lines and 10 cultivars were tested in 11 cultivation sites in Paraná in the 2010 and 2011 growing seasons, with the objective of this study was to select wheat lines and identify ideal test environments for maximizing yield and baking quality. AMMI and GGE Biplot graphic methodologies were used for data analysis. In 2010 crop season, Nova Fatima e Ventania locals classified themselves as discriminating and representative for grain yield (GY). In 2011 crop season, Apucarana and Astorga showed out as ideal environments to selection of genotypes with high baking quality. The ideal-genotype analysis indicated the BIO-08528 BIO-08228 lines to GY and protein concentration, respectively. In the 2011 crop season, BIO-10161 and BIO-10141 lines and were higher for GY and baking quality and should be selected. Grain protein concentration SDS-sedimentation test correlated with each other (r = 0,61**) and were positively associated with gluten strength (r = 0,49** and 0,74**), indicating that they can be used as indirect selection criteria for bread-making quality in wheat breeding programs.
Ottman, M. J., T. A. Doerge, and E. C. Martin. "Late Season Water and Nitrogen Effects on Durum Quality, 1995 (Final)." College of Agriculture, University of Arizona (Tucson, AZ), 1996. http://hdl.handle.net/10150/202421.
Full textOttman, M. J., T. A. Doerge, and E. C. Martin. "Late Season Water and Nitrogen Effects on Durum Quality, 1995 (Preliminary)." College of Agriculture, University of Arizona (Tucson, AZ), 1995. http://hdl.handle.net/10150/201443.
Full textFauzi, Mohamad Taufik. "The effect of growth regulators and nitrogen on Fusarium head blight of wheat /." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=69547.
Full textA survey conducted in a field trial testing the effect of the plant growth regulator Cerone on the yield components of several cultivars of spring wheat showed that Cerone treatments increased Fusarium infection only in cultivar Columbus. Further research was conducted using cultivar Max, a cultivar susceptible to fusarium head blight, which is widely grown in Quebec. In controlled-condition greenhouse trials, the growth regulators Cycocel and Cerone, as well as nitrogen fertilization did not influence the disease progress. In the 1991 field experiment, the highest incidence of seed infection was observed in Cycocel treatments when the macroconidia of F. graminearum were directly applied to the heads, but not significantly different from the non-treated control. None of the nitrogen levels affect the incidence of seed infection. In the 1992 field trial, the plots were treated with macroconidia of F. graminearum applied to the heads or with Fusarium-colonized corn applied to the rows. Both Cycocel and Cerone significantly increased the incidence of spikelet only in the colonized corn treatments. Cycocel also increased the incidence of seed infection, but only in colonized corn treatments. Cycocel also increased the incidence of seed infection in the non-inoculated treatments. Growth regulators had no effect on the disease when heads were inoculated directly with macroconidia.
Beche, Eduardo. "Caracteres agronômicos e fisiológicos associados ao progresso do melhoramento genético de trigo no Brasil." Universidade Tecnológica Federal do Paraná, 2013. http://repositorio.utfpr.edu.br/jspui/handle/1/465.
Full textConhecer os processos responsáveis pelo avanço do progresso genético do rendimento de grãos é uma etapa essencial para o desenvolvimento de cultivares mais produtivas. Os objetivos do estudo foram: a) Avaliar a duração dos subperíodos de desenvolvimento de cultivares de trigo brasileiros, lançados entre 1940 e 2009, e quantificar a importância de cada fenofase sobre o rendimento de grãos e seus componentes. b) Caracterizar, fisiologica e agronomicamente, cultivares de trigo desenvolvidos entre 1940 e 2009, a fim de identificar critérios de seleção mais efetivos à continuidade do progresso genético de melhoramento no Brasil. c) Caracterizar cultivares antigos e modernos brasileiros, lançados em diferentes décadas, quanto à eficiência do uso do nitrogênio e seus componentes. Dez cultivares de trigo brasileiros, antigos e modernos, foram avaliados em ensaios de competição, em duas safras agrícolas (2010 e 2011); na safra agrícola de 2011 um ensaio foi conduzido em casa de vegetação, com quatro doses de nitrogênio (0, 60, 120 e 180 kg N ha-1). Comparou-se a duração dos subperíodos, caracteres agronômicos e fisiológicos (trocas gasosas) e caracteres da eficiência do uso do nitrogênio (EUN). O melhoramento reduziu a fase de semeadura a antese e aumentou a fase de enchimento de grãos, contribuindo com o aumento da massa de mil grãos. Os genótipos modernos tiveram o subperíodo de espigueta terminal a antese aumentado (0,68 a 1,35 graus dias ano-1) ao longo dos anos, contribuindo com o incremento do número de grãos por espigueta, número de grãos por espiga, peso seco de espiga em antese e índice de fertilidade da espiga. O incremento de rendimento de grãos foi de 29 kg ha-1 ano-1, com um ganho genético de 0,92% ano-1 no período de 1940 e 2009. O progresso genético para rendimento de grãos foi principalmente relacionado ao incremente do índice de colheita, número de grãos e rendimento biológico, que foram alcançados pelo aumento da condutância estomática e da taxa fotossintética em pré e pós-antese e redução da estatura de planta. A eficiência de absorção de nitrogênio (EAN) foi positivamente associada com a eficiência do uso do nitrogenio (EUN) na ausência de adubação nitrogenada. A eficiência de utilização do nitrogenio (EUtN) e a EAN foram positivamente associadas a EUN nas doses elevadas de N. Os cultivares mais recentemente disponibilizados para cultivo (Quartzo, CD 117, BRS Tangará, BRS 220, BRS 208 e BRS Guamirim) foram mais eficientes no uso do nitrogênio e mais tolerantes a baixas doses em comparação ao grupo formado pelos cultivares BRS 179, BR 23, Toropi e Frontana.
Knowledge the processes responsible for the progress of genetic gain in grain yield in wheat plant is an essential step for the development of high yield cultivars. The aims of the study were: a) Evaluate the duration of developmental phases in wheat cultivars and quantify the importance of each phase on grain yield and its components. b) characterize physiological and agronomically wheat cultivars released in different decades, to identify selection criteria for continued improvement of genetic progress in Brazil. c) Characterize Brazilian wheat cultivars developed in different decades for the nitrogen use efficiency (NUE). Ten wheat cultivars released from1940 to 2009, were examined for two years in a competition essay (2010 and 2011) and in 2011 an essay in green house was conducted with four nitrogen rates (0, 60, 120 e 180 kg N ha-1). We compared the duration of periods, agronomic and physiological traits (gas exchange) and nitrogen use efficiency (EUN) characters. The Breeding reduced time to anthesis and increased the grain filling, contributing to the increase in thousand kernel weight. The modern cultivars had the period terminal spikelet to anthesis increased (0,68 to 1,35 degree days year-1) over the years, contributing to the increase in the number of grains per spikelet, number of grains per spike, spike dry weight at anthesis and spike fertility index. The increase in grain yield was 29 kg ha-1 yr-1, with a genetic gain of 0,92% yr-1 from 1940 to 2009, this is largely related to the increased of harvest index, number of grains m-2 and biological yield, which were achieved through improving stomatal conductance and photosynthetic rate in pre and post-anthesis and reduced in plant height. The nitrogen uptake efficiency (NUpE) was positively associated with nitrogen use efficiency (NUE) in the absence of fertilization. Nitrogen utilization efficiency (NutE) and NUpE were positively associated with NUE in higher N. The modern cultivars (Quartzo, CD 117, BRS Tangará, BRS 220, BRS 208 and BRS Guamirim) were more efficient in the use of nitrogen and more tolerant to low N input compared to the group formed by BRS 179, BR 23, Toropi and Frontana.
Doerge, T. A., T. C. Knowles, L. Clark, and E. Carpenter. "Effects of Early Season Nitrogen Rates on Stem Nitrate Levels and Nitrogen Fertilizer Requirements During Grain Filling for Irrigated Durum Wheat." College of Agriculture, University of Arizona (Tucson, AZ), 1989. http://hdl.handle.net/10150/201074.
Full textTrevizan, Diego Maciel. "Eficiência de uso e doses de nitrogênio em trigo sob diferentes arranjos espaciais de plantas." Universidade Tecnológica Federal do Paraná, 2017. http://repositorio.utfpr.edu.br/jspui/handle/1/2288.
Full textUma das alternativas para minimizar as perdas de nitrogênio (N), além do uso de cultivares de trigo (Triticum aestivum L.) mais eficientes na utilização desse nutriente, e a identificação de manejos que intensifiquem o aproveitamento do N. Para as cultivares e condições climáticas do Brasil, existem poucos estudos que tenham quantificado como o arranjo espacial de plantas afeta a eficiência de uso do N. O objetivo deste estudo foi avaliar o efeito de diferentes arranjos espaciais (combinação entre densidades de semeadura e espaçamento entre linhas) no desempenho agronômico e aproveitamento do N mineral aplicado. O experimento foi conduzido em Pato Branco, nas safras agrícolas de 2014 e 2015, em delineamento em blocos ao acaso, em modelo fatorial, com três repetições. Dois cultivares de trigo (CD 150 e Ametista) foram submetidos a quatro densidades de semeadura (150, 300, 450 e 600 sementes m-2), duas doses de N (20 e 120 Kg ha-1) e dois espaçamentos entrelinhas (0,17 e 0,25 m). As maiores produtividades de grãos foram alcançadas no menor espaçamento entrelinhas e alta dose de N, para ambos os cultivares e anos avaliados. As densidades, para máxima eficiência técnica, de 400 sementes m-2 para a cultivar CD 150 e 425 sementes m-2 para a cultivar Ametista proporciona os maiores rendimento de grãos, ambas para o menor espaçamento. A eficiência de uso, de absorção e de utilização do N foram superiores nas condições com menor nível de N. Em ambos os espaçamentos utilizados, a eficiência de uso do N foi favorecida no menor espaçamento, bem como a eficiência de absorção do N. Os resultados permitem concluir que o teor de N proveniente da mineralização da matéria orgânica deve ser empregado como parâmetro para aplicação de N em cobertura. Com isso, evitar o uso excessivo do mesmo e otimizar tanto o rendimento de grãos quanto os parâmetros da eficiência de uso do N.
An alternative to minimize Nitrogen (N) losses, beyond use of more efficient wheat (Triticum aestivum L.) varieties on the use of this nutrient, is the identification of managements to intensify the use of N. For the varieties and climatic conditions of Brazil, there are few studies that have quantified how the spatial arrangement of plants affects the N-use efficiency. The objective of this study was to evaluate the effect of different spatial arrangements (combination between seeding rates and row spacing) on agronomic performance and utilization of the applied mineral nitrogen. The experiment was conducted in Pato Branco in the crops year 2014 and 2015, in a randomized block design, a factorial model, with three replications. Two wheat cultivars (CD 150 and Ametista) were submitted to four seeding densities (150, 300, 450 and 600 seeds m-2), two N doses (20 to 120 kg ha-1) and two row spacings (0.17 and 0.25 m). The highest grain yields were reached at the lowest line spacing and high nitrogen dose for cultivars and evaluated years. The densities, for maximum technical efficiency, of 400 seeds m-2 for the cultivar CD 150 and 425 seeds m-2 for the cultivar Ametista provides highest grain yield, for both cultivars and years evaluated. The N-use efficiency, N-uptake efficiency and N-utilization efficiency were higher in the conditions with lower level of N. In both spacings used, N-use efficiency was favored in the least spacing, as well as N-uptake efficiency. The results showed that the N content from the mineralization of organic matter should be used as a parameter for N application in the cover. Thus, avoiding excessive use of it and optimize both the grain yield as the N-use efficiency parameters.
Mooleki, Siyambango Patrick. "Synchronization of nitrogen availability and plant nitrogen demand, nitrogen and non-nitrogen effects of lentil to subsequent wheat crops." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0029/NQ63902.pdf.
Full textOttman, M. J., and S. H. Husman. "Nitrogen Fertilizer Movement in Wheat Production, Higley." College of Agriculture, University of Arizona (Tucson, AZ), 1994. http://hdl.handle.net/10150/201420.
Full textOttman, M. J., and S. H. Husman. "Nitrogen Fertilizer Movement in Wheat Production, Yuma." College of Agriculture, University of Arizona (Tucson, AZ), 1994. http://hdl.handle.net/10150/201421.
Full textOttman, M. J., and B. R. Tickes. "Nitrogen Fertilizer Movement in Wheat Production, Roll." College of Agriculture, University of Arizona (Tucson, AZ), 1994. http://hdl.handle.net/10150/201429.
Full textBhogal, Anne. "Effect of long-term nitrogen applications on nitrogen cycling under continuous wheat." Thesis, University of Nottingham, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294731.
Full textDick, G., J. Harper, L. Moore, and M. Ottman. "Effect of Russian Wheat Aphid on Durum Wheat Yield." College of Agriculture, University of Arizona (Tucson, AZ), 1988. http://hdl.handle.net/10150/200817.
Full textDoerge, Thomas, and Mike Ottman. "Predicting the Nitrogen Needs of Wheat Using Stem Nitrate Analysis." College of Agriculture, University of Arizona (Tucson, AZ), 1986. http://hdl.handle.net/10150/200546.
Full textZhou, Maoqian 1961. "Nitrogen fixation by alfalfa as affected by salt stress and nitrogen levels." Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/277231.
Full textOttman, M. J., and N. Vigorito. "Nitrogen Fertilizer Movement in the Soil as Influenced by Nitrogen Rate and Timing in Wheat Production, 1991." College of Agriculture, University of Arizona (Tucson, AZ), 1994. http://hdl.handle.net/10150/201430.
Full textOttman, M. J., and N. Vigorito. "Nitrogen Fertilizer Movement in the Soil as Influenced by Nitrogen Rate and Timing in Wheat Production, 1992." College of Agriculture, University of Arizona (Tucson, AZ), 1994. http://hdl.handle.net/10150/201431.
Full textOttman, M. J. "Nitrogen Fertilizer Requirement of Feed and Malting Barley Compared to Wheat, 2011." College of Agriculture, University of Arizona (Tucson, AZ), 2012. http://hdl.handle.net/10150/211153.
Full textClark, Lee J., and Keller F. Ellsworth. "Durum wheat response to nitrogen fertilization at Safford Agricultural Center, 2004." College of Agriculture, University of Arizona (Tucson, AZ), 2004. http://hdl.handle.net/10150/203827.
Full textClark, Lee J., and Keller F. Ellsworth. "Durum wheat response to nitrogen fertilization at Safford Agricultural Center, 2003." College of Agriculture, University of Arizona (Tucson, AZ), 2003. http://hdl.handle.net/10150/205401.
Full textOttman, M. J. "Solum Barley Nitrogen and Phosphorous Fertilizer Trial." College of Agriculture, University of Arizona (Tucson, AZ), 1995. http://hdl.handle.net/10150/201446.
Full textJamjod, Sansanee. "Genetics of boron tolerance in durum wheat." Title page, contents and abstract only, 1996. http://web4.library.adelaide.edu.au/theses/09PH/09phj324.pdf.
Full textDoerge, T., T. Knowles, and M. Ottman. "Evaluation of the Accuracy of a Wheat Stem Nitrate Test in Predicting Nitrogen Requirements of Irrigated Durum Wheat." College of Agriculture, University of Arizona (Tucson, AZ), 1988. http://hdl.handle.net/10150/200815.
Full textBarczys, Cathleen. "THE EFFECT OF AUDIBLE SOUND FREQUENCY ON THE GROWTH RATE OF YOUNG WHEAT PLANTS." Thesis, The University of Arizona, 1985. http://hdl.handle.net/10150/275379.
Full textRoth, Bob, Bryant Gardner, and Barry Tickes. "Barley Response to Water and Nitrogen Levels." College of Agriculture, University of Arizona (Tucson, AZ), 1987. http://hdl.handle.net/10150/203803.
Full textOttman, M. J. "Effect of Planting Date on Wheat Yield in Yuma, 2013." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2013. http://hdl.handle.net/10150/312151.
Full textClark, Lee J., and E. W. Carpenter. "Wheat and Barley Response to Nitrogen Fertilization at Safford Agricultural Center, 2000." College of Agriculture, University of Arizona (Tucson, AZ), 2000. http://hdl.handle.net/10150/204097.
Full textClark, Lee J., and E. W. Carpenter. "Wheat and barley response to nitrogen fertilization at Safford Agricultural Center, 2001-02." College of Agriculture, University of Arizona (Tucson, AZ), 2002. http://hdl.handle.net/10150/203857.
Full textDoerge, T., T. Knowles, M. Ottman, and L. Clark. "Comparison of Residual Nitrate and Fertilizer Nitrogen Efficiency in Basin Irrigated Wheat." College of Agriculture, University of Arizona (Tucson, AZ), 1988. http://hdl.handle.net/10150/200816.
Full textHusman, S. H., and M. J. Ottman. "Nitrogen Fertilization of Durum Based on Stem Nitrate, Buckeye, 1996." College of Agriculture, University of Arizona (Tucson, AZ), 1996. http://hdl.handle.net/10150/202441.
Full textDoerge, Thomas, Tim Knowles, and Mike Ottman. "Inproved Nitrogen Management in Irrigated Wheat Production Using Stem Nitrate Analysis." College of Agriculture, University of Arizona (Tucson, AZ), 1987. http://hdl.handle.net/10150/203766.
Full textDoerge, T. A., and M. J. Ottman. "Predicting Late Season Nitrogen Fertilizer Requirements of Irrigated Durum Wheat Using Stem Nitrate Analyses." College of Agriculture, University of Arizona (Tucson, AZ), 1990. http://hdl.handle.net/10150/201347.
Full textRiley, E. A., T. L. Thompson, S. A. White, and M. J. Ottman. "Tissue Testing Guidelines for Nitrogen Management in Malting Barley, Maricopa, 1998." College of Agriculture, University of Arizona (Tucson, AZ), 1998. http://hdl.handle.net/10150/208274.
Full textRoth, B., B. Gardner, and B. Tickes. "Barley Response to Water and Nitrogen, 1988." College of Agriculture, University of Arizona (Tucson, AZ), 1988. http://hdl.handle.net/10150/200813.
Full textMigner, Pierre. "The effect of seeding density and nitrogen fertility on the yield and quality of a hard red spring wheat in Quebec /." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=56675.
Full textCepeda, Jose de los Angeles 1955. "Nitrogen fixation by alfalfa as affected by osmotic potentials and measured by nitrogen-15 techniques." Thesis, The University of Arizona, 1987. http://hdl.handle.net/10150/276591.
Full textPapadopoulos, Anastasios K. "Nitrogen and moisture distributions under subirrigated soybeans." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=55520.
Full textYields were measured in terms of number of beans per plant, number of pods per plant, number of beans per pod, and seed protein content at harvest.
Soil samples collected at depths of 30 and 70 cm from the soil surface were analyzed for moisture content and NO$ sb3 sp-$-N and NH$ sb4 sp+$-N concentrations.
The experimental results showed that controlled watertable management increased the yield and decreased soil NO$ sb3 sp-$-N levels. The best results from the watertables tested were found to be at 60 and 80 cm. This is suggested as the range of watertable depths that should be maintained for optimum soybean production.
Ayub, Najma. "The effect of VAM inoculation on interplant ¹⁵N transfer." Thesis, University of Aberdeen, 1991. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU546184.
Full textSalazar, Adriana Isabel Diaz. "Effect of nitrogen, sulfur, and potassium chloride fertilization on the baking quality of soft red winter wheat." Thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-03242009-040439/.
Full textYousfi, Salima. "Salinidad y trigo duro: Firmas isotópicas, actividad enzimática y expresión génica." Doctoral thesis, Universitat de Barcelona, 2012. http://hdl.handle.net/10803/83604.
Full textInadequate irrigation for long term and under conditions of high evapotranspiration demand, combined with the use of poor water quality and the lack of adequate drainage frequently induces the salinization of arable land causing a significant increase in the area affected by salinity. Salinity is an environmental factor that limits in a remarkable manner the production of crops in many parts of the world, but especially in arid and semiarid regions like the Mediterranean. Under these conditions, which is often grown durum wheat improvement for tolerance to salinity under irrigation deficit may be one of the strategies to alleviate this problem. This Thesis shows that isotope compositions of carbon (δ13C), oxygen (δ18O), and nitrogen (δ15N) and the concentration of nitrogen in dry matter are potentially and effective criteria for discriminating between different growing conditions and between genotypes tolerant or susceptible to salt. Furthermore, the results of this study reflect the importance of nitrogen metabolism in tolerance to salinity. Additionally, this thesis develops a model relating genotypic tolerance to different conditions of salinity and drought with the signatures of the three isotopes (C, O, N), together with photosynthetic and transpiration exchanges and parameters key of nitrogen metabolism such as nitrogen concentration and activities of the glutamine synthetase and nitrate reductase. Finally, we study the relationship between the expression of genes potentially key in the tolerance to salinity and drought and genotypic variability in response to different combinations of these stresses.
Ottman, M. J., T. C. Knowles, and S. H. Husman. "Late Season Nitrogen Fertilizer for Durum at Buckey, Casa Grande, and Vicksburg, 1996-97." College of Agriculture, University of Arizona (Tucson, AZ), 1997. http://hdl.handle.net/10150/202472.
Full textKnowles, Tim C., Michael J. Ottman, and Rock Cramer. "Influence of Nitrogen Fertilizer Applied at Flowering on Durum Wheat Grain Yield and Quality." College of Agriculture, University of Arizona (Tucson, AZ), 1996. http://hdl.handle.net/10150/202440.
Full textSaberi, Hossein Khabaz. "Manganese efficiency in durum wheat (Triticum targidum L. var durum)." Title page, contents and summary only, 1999. http://web4.library.adelaide.edu.au/theses/09APSP/09apsps115.pdf.
Full textRoss, Delaney Meredith. "Effect of nitrogen rate and weed density on spring wheat yield at two landscape positions." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/MQ62837.pdf.
Full textKoenig, Karen. "The effect of nitrogen fertilization on protein content and bread baking properties of wheat flour." Diss., Virginia Polytechnic Institute and State University, 1988. http://hdl.handle.net/10919/53557.
Full textPh. D.