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Dissertations / Theses on the topic 'Wheat fertilizers'

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Published: 4 June 2021

Last updated: 21 February 2023

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1

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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2

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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3

Richardson, Paul. "Intercellular distribution of nitrate in wheat leaves." Thesis, Bangor University, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.357712.

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4

Adogla-Bessa, Tsatsu. "Enzyme treatment of whole-crop wheat silage." Thesis, University of Reading, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.278039.

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5

Migner, 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.

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An experiment was conducted for two years to determine the effect of seeding rate, and nitrogen fertility on the yield and quality of hard red spring wheat (Triticum aestivum L.) in Quebec. The experiment was conducted on a Ste-Rosalie series soil (humic gleysol), in the St-Hyacinthe region, 50 km east of Montreal. The design of the experiment was a split-plot design. The treatments in the main plots were the plant densities while the nitrogen treatments (rate of nitrogen, number and timing of the applications and formulation of fertilizer nitrogen) were applied to the sub-plots. Nitrogen had

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6

Ayoub, Micheline. "Nitrogen management for bread wheat production in Quebec." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=69574.

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The effect of level and timing of nitrogen (N) fertilizer application on grain yield (YLD), grain protein (GPC), and breadmaking ability of four hard red spring wheat cultivars and on soil residual nitrate was investigated. Nitrogen fertility caused an increase in YLD, lodging, several yield components, GPC, and breadmaking quality and caused a reduction in N harvest index and grain ash, and N use efficiency (NUE) resulting in an increase in soil residual NO$ sb3$-N. Split N application reduced lodging, tillers and spikes m$ sp{-2}$ and caused an increase in grain weight, GPC, loaf volume and

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7

Yu, Shaobing. "Winter wheat nitrogen management in south coastal British Columbia." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/29888.

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Nitrogen is essential to obtain high yields of winter wheat in south coastal British Columbia, which includes Vancouver Island and the lower Fraser Valley. An accurate recommendation for N application is required to keep input costs down for most economical returns and to limit environmental problems related to leaching of excess N. The questions are how much, when and which form of N should be applied to winter wheat. The general objective of this study is to improve our understanding of winter wheat growth and N uptake. This study monitors the soil N supply and characterizes the plant develo

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8

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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9

Norrish, Shane. "Soil and water interactions controlling wheat crop response to phosphorus fertiliser in north-western New South Wales." View thesis, 2003. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20051013.115006/index.html.

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10

Kgope, Barney Stephen. "Effects of sustained elevated CO2 concentration and Nitrogen nutrition on wheat (Triticum aestivum L. cv Gamtoos)." Thesis, Rhodes University, 2000. http://hdl.handle.net/10962/d1003774.

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There is consensus that high CO2 results in enhanced growth and yield for most crop plants. However, most of these studies were carried out in the presence of adequate nutrients, which is also the case in agricultural systems (managed ecosystems). About 20% of the earth’s land mass have sufficiently low levels of nutrients to cause some kind of stress to plants. On the other hand, elevated [CO2] decreases foliar nutrient elements in plants and as a result partitioning of certain nutrient elements in plants is altered. Little data is available on the partitioning of most nutrient elements in pl

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11

Metcalfe, Richard James. "Selection for resistance to demethylation inhibitor fungicides in Mycosphaerella graminicola on wheat." Thesis, University of Reading, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287645.

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12

Hickman, Dominic Richard. "Biochemical studies of the high molecular weight glutenin subunits of bread wheat." Thesis, University of Bristol, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.319101.

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13

Mercer, Lee Jonathan. "Radio-caesium uptake and flux in wheat as influenced by external potassium concentration." Thesis, Imperial College London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369102.

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14

Friedli, Georges-Louis. "Interaction of deamidated soluble wheat protein (SWP) With other food proteins and metals." Thesis, University of Surrey, 1996. http://epubs.surrey.ac.uk/2204/.

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15

Preston, Carolyn Margaret. "Effect of processing and feed enzyme inclusion in wheat-based diets for broilers." Thesis, Queen's University Belfast, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.361229.

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16

Nicholsby, J. A. "The fate of fertiliser nitrogen when applied to winter wheat under field conditions." Thesis, University of Reading, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.356236.

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17

Wood, Craig Christopher. "Ammonia fluxes across biological membranes : towards an azospirillum-wheat symbiosis." Thesis, The University of Sydney, 1999. https://hdl.handle.net/2123/27747.

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Wheat is a major food crop requiring large inputs of industrially produced nitrogenous fertiliser. There are significant economic and environmental advantages in replacing these additions of synthetic-N with those generated by biological N2 fixation (BNF). One approach to this problem would be to develop a diazotroph: cereal symbiosis. Azospirillum brasilense is capable of colonising and fixing N2 on wheat roots in the field and in the laboratory. However, there is no evidence of direct or substantial transfer of newly—fixed N to the wheat plants. In this thesis, A. brasilense and wheat were

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18

Baethgen, Walter E. "Optimizing soil and fertilizer nitrogen use by intensively managed soft red winter wheat." Diss., Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/74745.

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Field experiments were conducted in the Coastal Plain and Ridge and Valley regions of Virginia during the 1981-82 through 1985-86 winter wheat growing seasons. The treatments in all experiments consisted of varying amounts of N fertilizer rates applied at Zadoks' growth stages 25 (GS 25) and 30 (GS 30). The research was divided into three studies. The first study was conducted to assess the effect of N fertilizer rates and climatic conditions on the amounts and patterns of the crop N uptake. Dry matter production and total N concentration were measured in total above ground plant material at d

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19

Pirgozliev, Vassil R. "The effect of wheat cultivars on the growth performance and energy retention of broiler chickens." Thesis, Open University, 2000. http://oro.open.ac.uk/58074/.

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The nutritive values of twelve samples of different UK wheat cultivars from two different growing years were assessed. A series of chicken feeding experiments were conducted to examine the relationships between chemical composition, grain quality and energy content of the wheat samples and the growth performance of broiler chickens when fed these wheat samples as part of nutritionally complete diets. The efficiency of utilization of apparent metabolisable energy (AMEn) of wheat samples as a source of net energy (NE) was studied. Step-wisc multiple regression analysis indicated that the content

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20

Dupuis, Eartha M. "Poultry manure and inorganic fertiliser effects on soil fertility and microbial communities in wheat and corn agroecosystems." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=97946.

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Many producers in North America are finding it profitable to make the transition from conventional farming to organic agriculture. Organic fertilisers may affect crop production and soil quality differently than inorganic fertilisers. The objectives of this study conducted in Ste.-Anne-de-Bellevue. Quebec were to examine crop yield, grain quality, soil fertility and microbial community parameters in wheat and corn agroecosystems receiving poultry manure or inorganic fertiliser. Wheat grain yield declined and corn grain yield did not increase with higher N rates, suggesting that increased N sup

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21

Scharf, Peter C. "Nitrogen loss inhibitors in intensively managed winter wheat." Thesis, Virginia Polytechnic Institute and State University, 1988. http://hdl.handle.net/10919/52072.

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Several potential pathways exist for significant nitrogen loss from nitrogen fertilizer applied to winter wheat in Virginia. A number of materials have been previously identified which inhibit steps in one or more of these loss pathways. Ammonium polyphosphate, ammonium thiosulfate, dicyandiamide, potassium chloride, and monoammonium phosphate were chosen for use in the present study. They were mixed, singly and in combinations, with UAN solution or urea solution and spring top-dressed on soft red winter wheat. Experiments were conducted over two growing seasons at two locations each season. N

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22

Garand, Marie-Josée. "Management of nitrogen from underseeded clover and manures in spring wheat." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ50167.pdf.

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23

Berns, Adelina Cecilia de Andrade. "Características agronômicas de cultivares de trigo em resposta à época da adubação nitrogenada de cobertura." Universidade do Estado de Santa Catarina, 2005. http://tede.udesc.br/handle/handle/1230.

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Made available in DSpace on 2016-12-08T16:44:52Z (GMT). No. of bitstreams: 1 PGPV05MA001.pdf: 585348 bytes, checksum: d071c231c57e121ed066d664eba3e186 (MD5) Previous issue date: 2005-12-20<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>The wheat cultivars differed substantially in terms of tiller emission, plant architecture and growing cycle duration. Such differences may interfere in the ideal period to side-dress N to optimize the crop agronomic performance. This experiment was carried out aiming to identify the effects of timing of N side-dress on the main stem and til

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24

Saeed, K. F. "Effect of sulphur and silicon fertilizers on disease control and yield and quality of wheat." Thesis, University of Reading, 2016. http://centaur.reading.ac.uk/69068/.

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Published research showed there was a link between the abundance of septoria diseases (Zymoseptoria tritici and Parastagonospora nodorum) and sulphurous acid in acid rain. Historical records showed that P. nodorum was at a peak in 1970s while Z. tritici became more abundant at 1980s. Another, small scale, study showed that both pathogens were affected by sulphur, but Z. tritici was reduced more by sulphur than P. nodorum. These studies suggested it could be useful to investigate the effect of sulphur fertilizer under larger scale, field, conditions. Thus, the aim of this project was to study i

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25

Morrison, L. Teri. "Dry matter estimation and potassium fertilization of intensively managed soft red winter wheat." Thesis, Virginia Tech, 1988. http://hdl.handle.net/10919/43256.

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Dry matter production must be predicted to utilize nitrogen recommendation models for winter wheat at growth stage 30. Four methods of dry matter estimation were evaluated for their ability to predict dry matter production. The pasture probe, height, and rising plate methods did not have adequate prediction ability. The drop plate method predicted dry matter with an r² of prediction of 0.82 for all sites combined. The predictive ability for an individual site was lower. The combined model on an individual site caused a wide range of errors. Consequently, the four methods are not recommended fo

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26

Scharf, Peter Clifton. "Development of field-specific spring N rate recommendations for winter wheat." Diss., Virginia Tech, 1993. http://hdl.handle.net/10919/40078.

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27

Galehdar, Zahra. "Effects of different nitrogen-fertilizers on the rhizosphere biochemistry of winter wheat (Triticum aestivum) var. Fredrick." Thesis, University of Ottawa (Canada), 1990. http://hdl.handle.net/10393/5699.

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Wheat growth appeared to be similar with the different N-fertilizers. However, a tendency for more growth was observed under nitrate and a mixed nutrition. The supply of ammonium, a mixture of ammonium and nitrate or urea resulted in an acidic pH in the rhizosphere. Nitrate uptake by plants resulted in a pH increase of the rhizosphere. The amounts and types of amino acids in the rhizosphere were significantly (P 0.05) different under the various N-fertilizers. In the wheat rhizosphere supplied with nitrate the total amino acids were less than those of plants supplied with the other N-fertiliz

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28

Fauzi, 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.

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Plant growth regulators and nitrogen fertilization have been associated with the increased incidence of fusarium head blight, a destructive disease of wheat (Triticum aestivum L.). In Canada, the major causal organism of this disease is Fusarium graminearum Schwabe, the conidial state of Gibberella zeae (Schw.) Petch. Most studies concerning the effect of plant growth regulators on fusarium head blight were conducted in fields with natural infection. The objective of this research was to evaluate the effect of growth regulators and nitrogen fertilizer on the incidence of fusarium head blight o

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29

Koenig, 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.

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The effects of variation in nitrogen application during two growing seasons to Coker 916, a soft red winter wheat, on wheat grain and flour protein content and bread baking properties were examined. Nitrogen fertilization regimens tested included the single spring application of 168 kg/ha in growth stages 25 or 30, the split spring application of 224 kg/ha in growth stages 25 and 30, and no nitrogen application either in growth stages 25 and 30. Variation in rate of nitrogen application had a more consistent effect on grain and flour protein than did variation in timing. Grain and flour prote

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30

Hastenpflug, Marcel. "Desempenho de cultivares de trigo duplo propósito sob doses de adubação nitrogenada e regimes de corte." Universidade Tecnológica Federal do Paraná, 2009. http://repositorio.utfpr.edu.br/jspui/handle/1/245.

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A utilização de cereais de inverno com dupla aptidão é uma excelente alternativa para o sistema de integração lavoura-pecuária, comumente utilizado nas pequenas propriedades do Sul do Brasil, pois possibilita a produção de forragem associada à produção de grãos. Atualmente, já existe cultivares comerciais de trigo com duplo propósito desenvolvidos para o Estado do Rio Grande do Sul, sendo necessário avalia-los mais apropriadamente para as condições edafoclimáticas do Estado do Paraná. O objetivo deste estudo foi avaliar o rendimento de grãos e a qualidade dos mesmos, bem como a produção de for

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31

Rellaford, Matthew John. "Predicting and Enhancing Spring Wheat Grain Protein Content through Sensing and In-Season Nitrogen Fertilization." Thesis, North Dakota State University, 2018. https://hdl.handle.net/10365/28733.

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Grain protein content is an essential component to producing a profitable Hard Red Spring Wheat (HRSW) (Triticum aestivum L.) crop in the northern Great Plains. Growers can increase grain protein content through in-season N fertilization; however, the cost of these applications may outweigh the benefits. Predicting the grain protein content of early-season HRSW would give growers crucial information as they decide whether to apply in-season fertilizer to boost grain protein content. This research encompasses three studies; two of which aim to predict grain protein content with hand-held and ae

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32

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.

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Copy of author's previously published work inserted. Bibliography: leaves 147-189. This project examines the uptake of mineral N from the subsoil after anthesis and its effect on grain protein concentration (GPC) of wheat. The overall objective is to examine the importance of subsoil mineral N and to investigate the ability of wheat to take up N from the subsoil late in the season under different conditions of N supply and soil water availability. Greenhouse experiments investigate the importance of subsoil mineral N availability on GPC of wheat and the factors that contribute to the effective

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33

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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34

Rocha, Kassiano Felipe. "Rendimento e qualidade industrial de cultivares de trigo submetido à formas de parcelamento da adubação nitrogenada." Universidade Tecnológica Federal do Paraná, 2014. http://repositorio.utfpr.edu.br/jspui/handle/1/760.

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O trigo é um cereal de inverno importante nas propriedades agrícolas no esquema de rotação de culturas e, principalmente para gerar renda. O nitrogênio é o nutriente exigido em maior quantidade pela cultura e o é grande responsável pelo rendimento de grãos e pela composição da qualidade industrial de panificação. O manejo desse nutriente é de suma importância para que se forneça N em todos os estádios da planta, sendo necessário aplicá-lo de forma parcelada. O objetivo do trabalho foi avaliar a resposta do parcelamento da adubação nitrogenada sobre o rendimento de grãos e a qualidade de panifi

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35

Maali, Safiah Hasan. "Biomass production, yield and quality response of spring wheat to soil tillage, crop rotation and nitrogen fertilisation in the Swartland wheat producing area of South Africa." Thesis, Stellenbosch : University of Stellenbosch, 2003. http://hdl.handle.net/10019.1/949.

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Thesis (PhD(Agric) (Agronomy))--University of Stellenbosch, 2003.<br>108 leaves printed on single pages, preliminary pages i-vi and numbered pages 1-1 to 1-5 to 9-1 to 9-3. Includes bibliography, list of abbreviations and 22 figures in color. Digitized at 300 dpi grayscale and 300 dpi 24-bit Color to pdf format (OCR), using an HP Scanjet 8250 Scanner.<br>ENGLISH ABSTRACT: A long term experiment was conducted at the Langgewens Experimental Farm, near Malmesbury in the Western Cape province of the Republic of South Africa. The effect of soil tillage, crop rotation and nitrogen fertiliser rates

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36

Baublys, Andrius. "Augalų lapų optinių savybių analizės jutiklių OptRx naudojimas tręšiant kviečius." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140616_132912-60477.

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Siekiant taupiai naudoti degalus, trąšas, sėklas, augalų apsaugos produktus, gerinti gaminamų produktų kokybę ir konkurencingumą Lietuvos ūkininkų ūkiuose pradedamos diegti tiksliojo ūkininkavimo (TŪ) priemonės. Tikslusis ūkininkavimas prasideda atskiro lauko derlingumo, maisto medžiagų ir dirvožemio tipo skirtumų nustatymu. Šių duomenų pagrindu galima tikslingai planuoti technologines operacijas ir analizuoti biomasės derliaus įvairovės priežastis. Šiame darbe pateikiami žieminių ir vasarinių kviečių tręšimo mineralinėmis trąšomis, panaudojant augalų optinės analizės jutiklius OptRx, tyrimai.

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37

Ottman, 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.

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Ottman, 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.

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39

Ottman, 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.

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Labeled nitrogen fertilizer (N-15) was applied to wheat to determine fertilizer nitrogen movement in the soil at harvest. Most of the labeled fertilizer recovered in the soil was found in the surface few feet. The amount of nitrogen fertilizer detected below S feet was minimal.

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40

Щерба, А. Ю. "Дослідження впливу мінерального живлення на продуктивність та якість пшениці озимої". Thesis, Чернігів, 2021. http://ir.stu.cn.ua/123456789/25097.

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Щерба, А. Ю. Дослідження впливу мінерального живлення на продуктивність та якість пшениці озимої : випускна кваліфікаційна робота : 201 "Агрономія" / А. Ю. Щерба ; керівник роботи К. М. Кудряшова ; НУ "Чернігівська політехніка", кафедра аграрних технологій та лісового господарства. – Чернігів, 2021. – 55 с.<br>У дипломній роботі описується мінеральне живлення озимої пшениці та шляхи підвищення врожайності та якості культури. Досліджені ґрунтово- кліматичні умови регіону. Запропоновані додаткові методи підвищення врожаю та якості озимої пшениці за рахунок внесення хелатних мікродобрив: Авангард

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41

Stewart, Anna Elizabeth. "Full-Season and Double-Crop Soybean Response to Potassium Fertilizer." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/56473.

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Demand for potassium (K) increases with increasing soybean yield. Little research has been conducted on soybean response to K on coastal plain and piedmont soils of Virginia, especially in double-crop systems. Nineteen full-season and 14 double-crop soybean experiments were conducted in 2013 and 2014 in Virginia and northeastern North Carolina to determine full-season and double-crop soybean (with wheat straw remaining or removed) response to soil test K and K fertilizer application rates. Field moist, air dried, and oven dry soil test K extraction techniques were also compared to predict re

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42

Ottman, Michael J. "Response of wheat and barley varieties to phosphorus fertilizer, 2009." College of Agriculture, University of Arizona (Tucson, AZ), 2010. http://hdl.handle.net/10150/203770.

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Phosphorus fertilizer represents a significant portion of the cost of producing small grains. Some evidence exists that there are differences in the ability of small grain varieties to take phosphorus up from the soil and utilize this nutrient in the grain. The objective of this study is to determine if barley and wheat varieties grown in Arizona differ in their response to phosphorus fertilizer. A study was initiated at the Maricopa Agricultural Center testing the response of 7 barley and 13 wheat (12 durum wheat and 1 bread wheat) varieties to 2 phosphorus rates (0 and 100 lbs P2O5/acre). Th

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43

Ottman, M. J. "Response of Wheat and Barley Varieties to Phosphorus Fertilizer, 2011." College of Agriculture, University of Arizona (Tucson, AZ), 2012. http://hdl.handle.net/10150/211138.

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Phosphorus fertilizer represents a significant portion of the cost of producing small grains. Some evidence exists that there are differences in the ability of small grain varieties to take phosphorus up from the soil and utilize this nutrient in the grain. The objective of this study is to determine if barley and wheat varieties grown in Arizona differ in their response to phosphorus fertilizer. A study was conducted for the third year at the Maricopa Agricultural Center testing the response of 7 barley and 14 wheat (12 durum wheat and 2 bread wheat) varieties to 2 phosphorus rates (0 and 100

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Knowles, T., T. Doerge, L. Clark, and E. Carpenter. "Effects of Residual and Fertilizer Phosphorus on Durum Wheat Production and Wheat Stem Phosphate Levels." College of Agriculture, University of Arizona (Tucson, AZ), 1989. http://hdl.handle.net/10150/201072.

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Collecting additional data to calibrate and refine current guidelines for interpreting soil and plant test values is an ongoing need in Arizona. An experiment was conducted at the Safford Agricultural Center during the 1987 -89 crop years to evaluate the response of 'Aldura' durum wheat to a range of residual soil and fertilizer P levels. Maximum grain yields exceeding 5,500 lbs./A were obtained by banding 50 lbs. P₂O₅/A as triple superphosphate with the seed at planting in 1988. Residual P front phosphorus fertilizer applications up to 80 lbs. P₂O₅/A had no significant effect on grain yields

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Wang, Guangyao (Sam), Michael Ottman, and Rufus L. Chaney. "Effects of Zn fertilizer on cadmium accumulation in durum wheat." College of Agriculture, University of Arizona (Tucson, AZ), 2012. http://hdl.handle.net/10150/211139.

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Proposed reduction in maximum allowable cadmium (Cd) level in wheat grain from 0.2 to 0.15 ppm by European Union (EU) could affect Arizona wheat growers substantially. The possible breeding programs and management practices needs to be developed to keep the industry competitive for this major market. In this study, we used two durum wheat cultivars (Ocotillo representing higher Cd genotypes and Havasu representing lower Cd genotypes) to study the potential of Zn fertilizer (as ZnSO₄ and ground tire rubber) to reduce Cd uptake in durum wheat at Yuma Ag Center. While cadmium level in the two var

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Ottman, M. J. "Response of Wheat and Barley Varieties to Phosphorus Fertilizer, 2010." College of Agriculture, University of Arizona (Tucson, AZ), 2010. http://hdl.handle.net/10150/279396.

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Abstract:

Phosphorus fertilizer represents a significant portion of the cost of producing small grains. Some evidence exists that there are differences in the ability of small grain varieties to take phosphorus up from the soil and utilize this nutrient in the grain. The objective of this study is to determine if barley and wheat varieties grown in Arizona differ in their response to phosphorus fertilizer. A study was conducted for the second year at the Maricopa Agricultural Center testing the response of 7 barley and 14 wheat (12 durum wheat and 2 bread wheat) varieties to 2 phosphorus rates (0 and 10

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Knowles, 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.

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Application of nitrogen (N) fertilizer in conjunction with the irrigation event occurring closest to the flowering stage is effective in reducing the incidence of yellowberry and boosting grain protein levels of durum wheat. However, N applications at this time normally do not increase grain yield, except perhaps on very sandy soils. A field experiment was conducted to determine the profitability of applying 35 pounds of N per acre at flowering to durum wheat to avoid dockage for poor grain quality. Two treatments consisted of a check plot with no N applied at flowering and UAN 32 water run at

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Ottman, M. J. "Solum Barley Nitrogen and Phosphorous Fertilizer Trial." College of Agriculture, University of Arizona (Tucson, AZ), 1995. http://hdl.handle.net/10150/201446.

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Bhogal, 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.

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Christianson, Jessica Anne. "Screening Hard Red Spring Wheat Cultivars for Reduced Phosphorus Fertilizer Requirement." Thesis, North Dakota State University, 2017. https://hdl.handle.net/10365/28685.

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Phosphorus (P) is a common macronutrient required for hard red spring (HRS) wheat (Triticum aestivum L.) growth and yield expression, and is a significant expense for farmers. The objective of this study was to screen 89 cultivars of historical, current, and pending HRS wheat genotypes for relative P requirement. The cultivars were grown in a greenhouse over two years, using four rates of sodium phosphate for a rate response to the fertilizer. The genotypes were assessed using the Klepper-Haun technique for Haun stage and tiller initiation, and the plant material was analyzed for total P. It w

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