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Rozprawy doktorskie na temat „Irrigation Crop Production”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Sedibe, Moosa Mahmood. "Optimising water use efficiency for crop production." Thesis, Stellenbosch : Stellenbosch University, 2003. http://hdl.handle.net/10019.1/53541.

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Thesis (MScAgric)--University of Stellenbosch, 2003.<br>ENGLISH ABSTRACT: Poor water management and poor water use efficiency (WUE) have been identified as one of the major problems experienced by vegetable growers in most of the developing countries, including South Africa. This poor management and poor utilization of water have led to a drastic decline in the quality and quantity of available water. In South Africa agriculture uses about 50% of available water. Increasing water demand for domestic, industrial and mining uses, may decrease agriculture's share to less than the current 5

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Sleeper, Adam Maxey Sibley Jeffrey Lynn Chappell Jesse Alan. "Integration of intensive aquaculture and horticulture crop production." Auburn, Ala., 2009. http://hdl.handle.net/10415/1953.

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Bousso, Abou Elimane 1952. "Irrigation water use efficiency of crop calorie and protein production in Arizona." Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/191991.

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Irrigation water use efficiencies were studied for the State of Arizona in terms of nutritive values such as calories and proteins. The major crops and crop groups, 15 counties, 6 water planning districts, and four irrigation systems were evaluated. Cotton accounted for more than 40 percent of the Statewide total protein production. The most efficient calorie producing crop was potatoe. The feed crops produced the highest percentage of protein. On yield per acre basis, the leading counties were La Paz and Yuma. District IV produced the highest calorie and protein both per acre and acre-foot ba

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Newby, Adam F. "Increasing Water Application Efficiency in Greenhouse Crop Production UsingGravimetric Data." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1366376123.

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McGee, Eric Arthur. "Nitrogen cycling in irrigated crop production on hyperthermic soils within the Sonoran Desert." Diss., The University of Arizona, 1996. http://hdl.handle.net/10150/191205.

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Nitrogen (N) cycling involves the gains, losses, and transformations of N from sources such as soil organic matter, crop residues, and fertilizers. These sources are the primary N supplies potentially available to non-leguminous crops. Through the use of a stable N isotope tracer (¹⁵N), transformations among various soil N pools can be studied. We conducted three separate studies using ¹⁵N. Two studies dealt with methodologies of ¹⁵N use and analysis, while the third study investigated mineralization of ¹⁵N labeled crop residues under field conditions. The first study evaluated a new apparatus

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Finiza, Tabisa Nomava. "Assessing farmers’ aspirations and goals to expand irrigation crop production from homestead gardens to irrigation plots in Mhlontlo Local Municipality." Thesis, University of Fort Hare, 2014. http://hdl.handle.net/10353/d1016173.

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Most land is still state owned and is granted to users through traditional authorities. Even though the government has undertaken some programmes to reduce rural poverty and has initiated land reform programmes, improved service delivery and formed new water rights legislation in rural areas, the problem of low crop production still persists among South African farmers. The study was undertaken to identify different farmers’ aspirations and goals for expanding their crop production from homestead gardening to irrigation plots in Mhlontlo Local Municipality, in the Eastern Cape of South Africa.

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Nelson, J. M., R. E. Briggs, and G. Hart. "Effect of Irrigation Termination Date on Defolation and Yield of Upland Cotton for Short-Season Production." College of Agriculture, University of Arizona (Tucson, AZ), 1990. http://hdl.handle.net/10150/208289.

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A field study was conducted at the Maricopa Agricultural Center to determine the influence of plant water stress on the effectiveness of defoliants and yield of short season cotton. Irrigation termination dates of 11, 18 and 24 August were used to achieve different levels of water stress at the time defoliants were applied (1 September). Irrigation termination dates had little effect on the response of cotton to defoliants. Def-6 at the lowest rate tested, 0.75 lbs a.i./A, was less effective in defoliating cotton with a 24 August irrigation termination date than cotton terminated earlier. Drop

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Burdack, Doreen. "Water management policies and their impact on irrigated crop production in the Murray-Darling Basin, Australia." Phd thesis, Universität Potsdam, 2014. http://opus.kobv.de/ubp/volltexte/2014/7224/.

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The economic impact analysis contained in this book shows how irrigation farming is particularly susceptible when applying certain water management policies in the Australian Murray-Darling Basin, one of the world largest river basins and Australia’s most fertile region. By comparing different pricing and non-pricing water management policies with the help of the Water Integrated Market Model, it is found that the impact of water demand reducing policies is most severe on crops that need to be intensively irrigated and are at the same time less water productive. A combination of increasingly f

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Musunda, Bothwell Zvidzai. "Evaluation of cover crop species for biomass production, weed suppression and maize yields under irrigation in the Eastern Cape Province, South Africa." Thesis, University of Fort Hare, 2010. http://hdl.handle.net/10353/347.

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Achieving high biomass yields of cover crops has been a challenge to the success of Conservation Agriculture (CA) practices in the Eastern Cape (EC). A study was conducted to evaluate strategies for optimizing cover crop biomass production. Trials were carried out to screen summer and winter cover crops, as well as evaluate intercropping patterns and planting dates for biomass, weed suppression and subsequent maize yield under irrigation. Four summer legume cover crop species were evaluated under a Randomised Complete Block Design (RCBD) design. The cover crops were fertilized with 13.34 kg ha

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10

Wang, Zheng. "THE INFLUENCE OF PRODUCTION PRACTICES, TILLAGE, AND ENDOPHYTIC BACTERIA ON BELL PEPPER PRODUCTIVITY AND PHYSIOLOGY UNDER DIFFERENT IRRIGATION REGIMES." UKnowledge, 2015. http://uknowledge.uky.edu/pss_etds/55.

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To evaluate the strip tillage in organic bell pepper (Capsicum annuum L.) production as an integrated system for sustainable vegetable cropping two-years of field trials were conducted in 2011 and 2012. The field trials were conducted to determine the viability of strip tillage in conventional and organic bell pepper production systems by comparing plant growth, water status, and fruit yield to plastic mulch grown plants application under different irrigation regimes. The two-year field data demonstrated that organic pepper with strip tillage application was a viable combination that produced

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11

Maaß, Oliver. "Analyzing Transactions in Linked Value Chains of Wastewater Treatment and Crop Production." Doctoral thesis, Humboldt-Universität zu Berlin, 2019. http://dx.doi.org/10.18452/20128.

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In dieser Dissertation wird der Einfluss von Transaktionen zur Wiederverwendung von Nährstoffen und gereinigtem kommunalen Abwasser auf die Wertschöpfungsketten der Abwasserbehandlung und Pflanzenproduktion untersucht. Ziel ist es, Kosten und Nutzen sowie die Wertschöpfung von Transaktionen in verknüpften Wertschöpfungsketten der Abwasserbehandlung und Pflanzenproduktion zu analysieren. Darüber hinaus wird untersucht, wie Transaktionen und Interdependenzen zwischen Akteuren in verknüpften Wertschöpfungsketten die lokalen Governance-Strukturen für die Wiederverwendung von Abwasser beeinflussen.

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Dube, Elias Edo. "Wireless Farming: a mobile and Wireless Sensor Network based application to create farm field monitoring and plant protection for sustainable crop production and poverty reduction." Thesis, Malmö högskola, Fakulteten för teknik och samhälle (TS), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-20488.

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There is a remarkable growth in the field of Information Communication Technology (ICT) in Developing Countries (DCs). Telecommunication is one of the areas where ICT is recording an ongoing rapid change. Mobile phones are becoming pervasive in daily scenario; and among the beneficiaries of this are farmers. Farmers are using mobile phones in executing their farming business and daily life. At the same time, Wireless Sensor Networks (WSNs) are also showing a result in developed part of our world. WSNs potential in sensing various environmental condition, their affordability and applicability m

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Medeiros, Henrique Rocha de. "Avaliação de modelos matemáticos desenvolvidos para auxiliar a tomada de decisão em sistemas de produção de ruminantes em pastagens." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/11/11139/tde-27112003-100019/.

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Nos sistemas agropecuários (SA) o meio-ambiente, o solo, os animais e as plantas são componentes indissociáveis no processo de produção. Além disso, nesses sistemas o tempo de produção é relativamente longo. Essas características dos SA incrementam o risco e a incerteza associados às alternativas de decisão tomadas no processo de produção. Uma ferramenta que pode ser utilizada para auxiliar esse processo são os modelos matemáticos. Os modelos são uma representação simplificada da realidade e permitem estimar a resposta (e.g., produção) de um sistema face a alterações no processo e/ou de

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14

Kang, Sideth. "Effect of irrigation on growth and nitrogen accumulation of Kabuli chickpea (Cicer arietinum L.) and narrow-leafed lupin (Lupinus angustifolius L.)." Diss., Lincoln University, 2009. http://hdl.handle.net/10182/1126.

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A field experiment was conducted to examine the responses in growth, total dry matter (TDM), seed yield and nitrogen (N) accumulation of Kabuli chickpea cv. Principe and narrow-leafed lupin cv. Fest to different irrigation levels and N fertilizer on a Templeton silt loam soil at Lincoln University, Canterbury, New Zealand in 2007/08. The irrigation and fertilizer treatments were double full irrigation, full irrigation, half irrigation and nil irrigation and a control, full irrigation plus 150 kg N ha⁻¹. There was a 51 % increase in the weighed mean absolute growth rate (WMAGR) by full irrigati

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15

Balasubramaniam, Rengasamy. "The effects of foliar diseases and irrigation on root development, yield and yield components of wheat (Triticum aestivum L.)." Lincoln College, University of Canterbury, 1985. http://hdl.handle.net/10182/1514.

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Studies were conducted on three field trials of wheat cv. Kopara to investigate the lack of compensation by later determined components of yield because of early disease constraints. The investigation was based on the hypothesis that early disease reduces root development and thus causes the plants to be water constrained at later growth stages when soil water deficits usually occur. The reduced root development and soil water deficits may reduce the ability of the plant to compensate for reductions in early determined components. The hypothesis was tested by the application of irrigation to a

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Sheedy, M., M. Ottman, and T. Ramage. "Forage Production of Four Crops Grown Under Two Different Irrigation Cultures." College of Agriculture, University of Arizona (Tucson, AZ), 1989. http://hdl.handle.net/10150/201051.

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Garrot, D. J. Jr, M. J. Ottman, D. D. Fangmeier, S. H. Husman, and J. M. Harper. "Scheduling Wheat Irrigations Using Infrared Thermometers and the Crop Water Stress Index in Arizona." College of Agriculture, University of Arizona (Tucson, AZ), 1990. http://hdl.handle.net/10150/201349.

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Durum wheat (Triticum turgidum L. var. durum ) is grown as a winter annual crop, normally in rotation with cotton, and in 1989, comprised 121,500 acres in Arizona. Winter rainfall is insignificant, therefore water is supplied totally through surface irrigation. The relationship between the timing and amount of irrigation water applied and grain yields have not been well -defined Field plot studies were conducted in 1986 and 1987 to test the feasibility of using the Crop Water Stress Index (CWSI) to time wheat irrigations and also to determine the relationship among the CWSI, grain production,

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18

Gidi, Lungile Sivuyile. "Rural households livelihoods' strategies and opportunities with regard to farming: a case of Intsika Yethu Local Municipality." Thesis, University of Fort Hare, 2013. http://hdl.handle.net/10353/d1007218.

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South Africa and other developing countries are grappling with high levels of poverty as a result of slow to negligible rural development. Irrigation development is one essential component that can be used to address the challenges faced by smallholder farmers in rural areas. In the President‟s “State of the Nation Address” in 2011, the President of South Africa outlined measures to reduce hunger and poverty in communal areas through enhanced government‟s expenditures in rural infrastructure developments, especially for such amenities as irrigation and roads, with a view to promoting food secu

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Handoufe, Abderrahim. "Reponses a l'eau et a l'azote d'un ble tendre (triticum aestivum) sous un climat semi-aride." Toulouse 3, 1988. http://www.theses.fr/1988TOU30237.

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(. . . ) les resultats ont montre que la meilleure efficience de l'eau est obtenue lorsque cette derniere est apportee pendant la phase gonflement-floraison. Pendant le reste du cycle, le ble s'est avere tres peu sensible a la secheresse. Neanmoins, l'irrigation au semis sur un sol sec a favorise le developpement du systeme racinaire qui, a son tour a permis une meilleure exploitation de la reserve hydrique du sol. (. . . )

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Harena, Tchamse. "Essai de validation et perspectives d'application en agrometeorologie d'un modele de simulation de la croissance et du developpement du mais : ceres-maize." Clermont-Ferrand 2, 1988. http://www.theses.fr/1988CLF2D214.

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Apres une description du modele couple de simulation du bilan hydrique, du developpement et de la croissance, les valeurs simulees sont comparees aux donnees recueillies lors de quatre annees d'experimentation dans le puy-de-dome sur deux varietes de mais (dea et boree). On a constate que du point de vue phenologique le modele presente un retard de precocite et que les valeurs de croissance sont sous estimees. On etudie la sensibilite du modele aux parametres genetiques d'entree et a deux coefficients numeriques (phyllochrone et plastochrone), puis a la variation de l'etat hydrique du sol et a

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Vijaya, Kumar IMK. "Production and quality of industrial hemp (Cannabis sativa L.) in response to water regimes." Thesis, 2021. https://eprints.utas.edu.au/45888/1/Vijaya_Kumar_whole_thesis.pdf.

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Drought and waterlogging stresses are major environmental constraints, which severely limit crop production in Australia, and worldwide. Both water deficiency and waterlogging stresses influence crop physiological and biochemical mechanisms and thereby crop growth and production. Responses of hemp (Cannabis sativa L.) to adverse soil moisture conditions are poorly understood and rarely studied, either within or outside Australia. Accordingly, this study investigated the effect of different soil water contents, ranging from water limiting to waterlogging conditions, on physiological, growth and

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"Greenhouse gas emissions from irrigated crop production in the Canadian Prairies." Thesis, 2014. http://hdl.handle.net/10388/ETD-2014-09-1718.

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Irrigated agriculture in the Canadian Prairies is in a position to play a prominent role in addressing global food demands imposed by a growing world population. Particularly within Saskatchewan there is potential to see large increases in the number of irrigated hectares, due to the large irrigable land base and supply of freshwater resources. Yet, how this increase will influence the agricultural greenhouse gas (GHG) balance is not well understood. Through the quantification and comparison of GHG emissions from a typical irrigated and dryland cropping system in Saskatchewan, this research ai

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(9826022), Lance Pendergast. "Benefits of aeration of subsurface drip irrigation water: Field evidence on CQ highlands vertosols." Thesis, 2011. https://figshare.com/articles/thesis/Benefits_of_aeration_of_subsurface_drip_irrigation_water_Field_evidence_on_CQ_highlands_vertosols/13463510.

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Irrigation of heavy soils can result in temporary anoxic conditions in the rhizosphere. The aeration of the subsurface drip irrigation water was calculated to deliver an amount of oxygen that is significant to root respiration (equivalent to some hours of respiration need). Broadacre cotton (Gossypium hirsutum L.) irrigated with aerated water developed significantly more extensive and heavier (17.3%) root systems, canopies that enabled greater light interception (2.6% ), and produced significantly higher lint yields ( 16%) due to more bolls per plant (15%) in the 05/06 season. The increased y

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Kizza, Teddy. "Modeling Salinity Impact on Ground Water Irrigated Turmeric Crop." Thesis, 2013. http://etd.iisc.ac.in/handle/2005/3421.

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Soils in irrigated fields are impacted by irrigation water quality. Salts in the irrigation water may accumulate in the soil depending on amount of leaching, the quality of water and type of ions present. Salinity is an environmental hazard that is known to limit agriculture worldwide. The quality of irrigation water is thus of concern to agriculturists. More so is the impact it has on productivity. The objective of this study was to quantify the impact due to use of ground water of such quality, with respect to salinity, as found in Berambadi watershed of Southern India, under farmers‟ field

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Kizza, Teddy. "Modeling Salinity Impact on Ground Water Irrigated Turmeric Crop." Thesis, 2013. http://etd.iisc.ernet.in/2005/3421.

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Soils in irrigated fields are impacted by irrigation water quality. Salts in the irrigation water may accumulate in the soil depending on amount of leaching, the quality of water and type of ions present. Salinity is an environmental hazard that is known to limit agriculture worldwide. The quality of irrigation water is thus of concern to agriculturists. More so is the impact it has on productivity. The objective of this study was to quantify the impact due to use of ground water of such quality, with respect to salinity, as found in Berambadi watershed of Southern India, under farmers‟ field

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Kaini, Santosh. "Climate change impacts on river water availability for irrigation, crop irrigation water requirements and canal system capacity needs in an irrigation scheme in Nepal." Thesis, 2021. https://vuir.vu.edu.au/42511/.

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The impacts of climate change on water resources and agriculture, accompanied by a growing population, have contributed to increasing food and water scarcity. Due to the continuing growth in population and changes in food requirement habits, the demand for agricultural products is increasing continuously. It has been projected that the rise in food demand will increase by 50-100% between 2009 to 2050. The irrigation sector plays a crucial role in the agricultural food production system, utilizing about 70% of the world‘s total annual water consumption. About 16% of the world‘s cropland is irri

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Fessehazion, M. K. (Melake Kessete). "Using adaptive management and modelling to improve nitrogen and water use efficiency in crop production : a case study using annual ryegrass." Thesis, 2012. http://hdl.handle.net/2263/27815.

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Poor management of nitrogen (N) fertilisers and water in agro-ecosystems reduces yield, quality and N-use efficiency, and leads to pollution. The objective of this study was to improve irrigation and N management for planted pastures through adaptive management with simple tools and modelling. Field experiments were conducted in 2007 and 2008 at Cedara (KwaZulu Natal) and Hatfield (Gauteng) using annual ryegrass as a case study under a range of N and irrigation application strategies. Collected data sets were also used to calibrate and validate the SWB-Pro (simple) and SWB-Sci (detailed) model

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Kaur, Arvinder. "The effects of production techniques on the yield and quality of some leafy vegetables." Thesis, 1997. https://vuir.vu.edu.au/15382/.

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An opportunity exists for Australia to satisfy the expanding Asian fresh produce markets, because of our climate, space and technology to expand and enhance production of fruit and vegetables. Growers always strive to obtain maximum yields of high quality produce from their fields. Many factors such as climate, suitable cultivars, cultivation practices, soil, availability of water and nutrients can influence yields of high quality produce. An important and effective method to reduce costs is to improve productivity while maintaining quality. East Gippsland, the focus of this study, has a sig

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(9875051), BR Weeden. "The commercial potential of sugar beet (Beta vulgaris) for sugar production in the Mareeba-Dimbulah Irrigation Area of North Queensland, Australia." Thesis, 2002. https://figshare.com/articles/thesis/The_commercial_potential_of_sugar_beet_Beta_vulgaris_for_sugar_production_in_the_Mareeba-Dimbulah_Irrigation_Area_of_North_Queensland_Australia/13424945.

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Sugarcane is a tropical plant grown for sugar production under a wide range of mainly warmer climates throughout the world whereas under temperate climates sugar beet is grown for sugar production. In Australia, sugarcane is grown predominantly in the tropical and subtropical regions of the east coast. Since 1996 there has been a rapid expansion of sugarcane production in the Mareeba-Dimbulah Irrigation Area (MDIA), which is part ofthe Atherton Tableland region, about 50 km inland from Cairns in north Queensland. The expansion has been due to declining sugar yields from sugarcane grown on the

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(9834818), Sachesh Silwal. "Comparative analysis of physiological and phenological traits of rice (Oryza sativa) under aerobic production systems in dry and wet tropics of Queensland, Australia." Thesis, 2017. https://figshare.com/articles/thesis/Comparative_analysis_of_physiological_and_phenological_traits_of_rice_Oryza_sativa_under_aerobic_production_systems_in_dry_and_wet_tropics_of_Queensland_Australia/13452425.

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Aerobic rice is becoming a more promising rice cultivation system due to increasing water scarcity for irrigation and occurrence of drought, especially in Australia. Rice cultivation on aerobic soil under rainfed conditions has shown potential for successful rice cultivation in tropical climate. Strategic irrigation during the critical growth period can help reduce the water demand on farm. Central Queensland has an annual rainfall of ca. 800 mm, and about 600 mm occurs during the wet season from December to March; whereas parts of the wet tropical north Queensland receive ca. 3000 mm annual r

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Johnstone, Paul R. "Nutrition and irrigation studies with processing tomato (Lycopersicon esculentum Mill.) : a thesis presented in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Plant Science at Massey University, Palmerston North, New Zealand." 2005. http://hdl.handle.net/10179/1603.

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Content removed due to copyright restriction: Appendix IV. Managing fruit soluble solids with late-season deficit irrigation in drip-irrigated processing tomato production (HortScience 40: 1 857-1861 ).<br>Improved fertilizer and irrigation management has become increasingly important for tomatoes (Lycopersicon esculentum Mill.) grown for processing. To reduce potential nutrient loss to the environment due to excessive supply, fertilizer recommendations should reflect plant demand determined in an optimal root environment. An aeroponics experiment examined the effect of low and high nutrient s

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Gadedjisso-Tossou, Agossou. "Impact of Climate and Soil Variability on Crop Water Productivity and Food Security of Irrigated Agriculture in Northern Togo (West Africa)." 2019. https://tud.qucosa.de/id/qucosa%3A38704.

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West Africa is subject to frequent yield losses due to erratic rainfall and degraded soils. At the same time, its population is expected to double by 2050. This situation is alarming in northern Togo, a West African dry savannah area, where rainfed maize is a staple food. Thus, it is necessary to improve agricultural productivity, e.g., by evaluating and introducing alternative irrigation management strategies, which may be implemented in this region. For this purpose, the present investigation focused on evaluating the potential of deficit and supplemental irrigation, as well as assessing the

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Gêmo, Hélder R. "The role of irrigation policies in expanding irrigated food production in Mozambique." Thesis, 2012. http://hdl.handle.net/10413/10589.

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In recognition of the crucial role irrigation plays in stabilizing agriculture production in the face of erratic rainfall that often affects Mozambique, the Government has, since national independence in 1975, implemented several policies regarding irrigation development. Yet, the country is still struggling to expand the area equipped for food crop irrigation. In particular, the formulation and implementation of irrigation policies has faced constraints in the expansion and effective use of irrigated land to ensure increased food production. Despite this, there has not been a systematic effor

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Abdelkhalik, Abdelsattar Gamal Abdelsattar. "Effect of continued and regulated deficit irrigation on the productivity of four vegetable crops in open-field conditions in the Mediterranean area." Doctoral thesis, 2020. http://hdl.handle.net/10251/129868.

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[ES] La escasez de agua se está convirtiendo en un problema en zonas áridas y semiáridas del mundo, donde se localiza parte de la producción de los principales cultivos hortícolas, como en el área mediterránea. La sequía es uno de los principales factores limitantes en la agricultura y está afectando gravemente a la producción de cultivos hortícolas. La mejora de la productividad del agua en la agricultura puede lograrse mediante la utilización de determinadas estrategias. El riego deficitario consiste en el aporte de agua por debajo de las necesidades de riego (NR) de los cultivos, de manera

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