Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 49 for “"Drip irrigation"”.
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Evaluation of pre-packaged agricultural drip irrigation kits
… of two different agricultural pre-packaged drip irrigation kit (PDIK) systems: Chapin Bucket Kit and International Design Enterprises (IDE) drip kit. PDIK systems are a cost-effective type of appropriate technology for the developing world because they reduce agricultural water consumption …
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A cost optimization of solar-powered, drip irrigation systems
… design and cost optimization for solar-powered, drip irrigation systems. Historical irradiance data and crop consumption data are considered and modelled during these design steps. A cost optimization is utilized in order to determine low-cost, optimum configuration that meets the required water …
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Self-installation of drip irrigation emitters for prototype emitter testing
… I tested methods of adhering factory-made drip emitters to the interior of short segments of piping. Different types of adhesive and pipe material combinations were tested, and I selected three combinations for further testing. Performance similar to factory-installed drip emitters was …
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Design and experimental study on pressure compensating emitters in drip irrigation
… the basic physics behind the collapsible tube dripper design used in drip irrigation. A study was performed on the dynamics of the flow limitation of collapsible tubes. Two parameters were studied: outlet hole diameter and effective length. Prototypes were made varying these parameters, and …
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Design Theories for Compact, Low-energy, Clog-resistant Drip Irrigation Emitters
… for compact, low-pressure, clog-resistant drip emitters that can make drip irrigation affordable, reliable, and easier for farmers to adopt. Broad adoption of water-efficient irrigation methods such as drip irrigation is imperative to sustainably meet projected global food demand against …
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SUBSURFACE DRIP IRRIGATION AND UREA PHOSPHATE USE IN VEGETABLES ON CALCAREOUS SOILS.
Drip irrigation lines placed 15 cm deep or 5 cm shallow below soil surface and furrow irrigation were compared on calcareous soils of southern Arizona. Crops grown were zucchini squash (Cucurbita pepo L.) 1982 and 1983 summers, and cabbage (Brassica oleracea var. capitata L.), 1982 fall. Furrows …
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Product architectures for solar-powered drip irrigation (SPDI) systems in the Middle East and North Africa
… region in the world. Solar-powered drip irrigation (SPDI) has the potential to increase water use efficiency and reduce fossil fuel use for irrigation. Despite these benefits, SPDI adoption is limited by its high investment cost and the misalignment between farmers' risk tolerance …
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ESTABLISHMENT OF TURFGRASS FROM SEED AND SOD IN SAND BASED SYSTEMS COMBINING SPRINKLER AND SUBSURFACE DRIP IRRIGATION SYSTEMS
… establishment of turfgrass using subsurface drip irrigation (SDI) in sand based media has limited success. However, it is unknown if starting with overhead (sprinkler) irrigation and transitioning to SDI can enhance turfgrass establishment. Two experiments were conducted at Stephen F. Austin …
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Optimizing Corn and Cotton Performance with Adaptive Management Systems and Subsurface Drip Irrigation in the Mid-Atlantic USA
… corn and cotton fields irrigated, increased irrigation adoption could stabilize/increase crop production outcomes in this region. Three studies were conducted to evaluate these management strategies with the following objectives: 1. To compare standard farmer practices with the Adaptive Corn …
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Lowering the cost of solar-powered drip irrigation systems for smallholder farmers through systems-level modeling, optimization, and field testing
… research is to lower the cost of solar-powered drip irrigation systems and thus make them more accessible to smallholder farmers, who operate farms that are less than 2 ha and normally located in rural communities. Current solar-powered drip irrigation systems that are conventionally sized are …
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Modeling and designing the future of drip irrigation : a validated parametric analysis used to design low power, pressure compensating drip emitters
Drip irrigation is a means of distributing the exact amount of water a plant needs by dripping water directly onto the root zone. It can produce up to 90% more crops than rain-fed irrigation, and reduce water consumption by 70% compared to conventional flood irrigation. In the coming years, the …
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Evaluation of Modern Irrigation Techniques with Brackish Water
Modern irrigation techniques are becoming increasingly important in water-scarce countries especially in arid and semiarid regions. Higher crop production and better water use efficiency are usually achieved by drip irrigation as compared to other irrigation methods. Furthermore, by using drip …
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Reducing the power required for irrigation : designing low-pressure, pressure-compensating drip irrigation emitters and high efficiency solar-powered pumps for emerging markets
… the physics behind pressure compensating (PC) drip irrigation emitters and a design of a highly efficient solar powered centrifugal pump for small-acreage farmers drawing from shallow groundwater. The global community is facing a worsening crisis with regards to the water-energy agriculture …
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Solid particles flow through labyrinth channels in drip emitters
Clogging of drip irrigation emitters can reduce the effectiveness of drip irrigation systems. The most common way of studying clogging in a laboratory setting is to recreate the actual timing conditions of on-site drip irrigation systems. However, this requires a clogging period on the order of …
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Design and fabrication of pressure-compensating compliant tubes
… tubes for use in low-pressure drip irrigation systems. Such devices would allow drip irrigation systems to operate at driving pressures much lower than those required by current available technology, allowing for cost and water savings in developing nations. Fabrication methods …
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Parametric design and performance validation of low-cost, low-pressure drip emitters and irrigation systems
… methods to reduce the cost and energy use of drip irrigation systems, with the aim of increasing their adoption among smallholder farmers. By 2050, the growing world population will require a 55% increase in food production above 2010 levels. Yet, agriculture already places a large strain on …
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Deficit Irrigation Strategies on young orange trees (cv Tarocco Sciara)
… to optimise water resources is to employ deficit irrigation (DI) strategies. DI effects on some physiological characters of young orange orchards were analysed. The orchard includes 300, 4-years old, plants located at the CRA-ACM experimental farm in Lentini, Sicily (37° 20 N; 14° 53 E). Four …
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Effect of geometry under emitter membrane on pressure compensating performance
… order to better understand pressure compensating drip irrigation emitters, an experiment was carried out in order to characterize the effects of emitter dimensions under the membrane on emitter performance. Emitter performance was characterized by two models, an overdamped model and a piecewise …
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Design Theory for Channel-less, Low-Pressure, Pressure-Compensating Drip Emitters
Drip irrigation is a tool used to aid farmers in water scarce locations by offering a higher water efficiency than conventional methods. However, drip systems require larger energy input thus increasing capital and operating expenses posing a barrier to its adoption, specifically in lower-middle …
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