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| Registros recuperados: 23 | |
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| Robinson, A.R.; Lauritzen, C.W.; Muckel, D.C.; Phelan, Jack. |
| An irrigation system should be designed to provide correct distribution, control, and measurement of the irrigation water. Usually a farmer takes his irrigation water from a canal through a headgate. Or he may receive it from a pipeline regulated by a valve, or perhaps from his own well and pump. Open ditches are most commonly used to carry the water to the fields. Water control structures are used to get it out of the ditches and onto the fields. Measurement devices are needed so the farmer can tell how much water he has applied to his field at any irrigation or over the season. Several types of structures are used to divert, convey, control, or measure irrigation water. Some of these are described, and their functions... |
| Tipo: Technical Bulletin |
Palavras-chave: Irrigation control; Research methodology; Mass Import - autoclassified (may be erroneous). |
| Ano: 1963 |
URL: http://eprints.nwisrl.ars.usda.gov/1140/1/7.pdf |
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| King, B.A.; Bjorneberg, D.L.. |
| The kinetic energy of discrete drops impacting a bare soil surface is generally observed to lead to a drastic reduction in water infiltration rate due to soil surface seal formation. Under center pivot sprinkler irrigation, kinetic energy transferred to the soil prior to crop canopy development can have a substantial effect on seasonal runoff and soil erosion. In the design of center pivot irrigation systems, selection of sprinklers with minimum applied kinetic energy could potentially minimize seasonal runoff and erosion hazard. Size and velocity of drops from five common center pivot sprinklers with flow rates of approximately 43 L/min were measured using a laser in the laboratory. The data were used to evaluate various approaches to characterize... |
| Tipo: Article |
Palavras-chave: Irrigation control; Sprinkler irrigation; Center pivot. |
| Ano: 2010 |
URL: http://eprints.nwisrl.ars.usda.gov/1566/1/1522.pdf |
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| Bjorneberg, D.L.; Ippolito, J.A.; Koehn, A.C.. |
| Water, sediment and nutrients flowing into and out of the 82,000 ha Twin Falls,ID irrigation tract were measured from 2005 to 2008. Approximately 80% of the water flowing into the watershed was irrigation water diverted from the Snake River. About 40% of the watershed inflow returned to the Snake River. Much of this return flow was water from subsurface drain tiles and tunnels that drain shallow groundwater. Converting from furrow to sprinkler irrigation, improved irrigation management, and constructed sediment ponds have reduced sediment loss from 460 kg/ha in 1971 to <100 kg/ha in 2005. In 2007 and 2008, more sediment and phosphorus entered the watershed than returned to the Snake River. Diverting irrigation water into the watershed removed 6300 Mg of... |
| Tipo: Conference or Workshop Item |
Palavras-chave: Irrigation control; Runoff losses; Nutrient losses; Nutrients; Soil. |
| Ano: 2013 |
URL: http://eprints.nwisrl.ars.usda.gov/1571/1/1527.pdf |
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| King, B.A.; Shellie, Krista. |
| Mild to moderate water stress is desirable in wine grape for controlling vine vigor and optimizing fruit yield and quality, but precision irrigation management is hindered by the lack of a reliable method to easily quantify and monitor vine water status. The crop water stress index (CWSI) that effectively monitors plant water status has not been widely adopted in wine grape because of the need to measure well-watered and non-transpiring leaf temperature under identical environmental conditions. In this study, a daily CWSI for the wine grape cultivar Syrah was calculated by estimating well-watered leaf temperature with an artificial neural network (NN) model and non-transpiring leaf temperature based on the cumulative probability of the measured difference... |
| Tipo: Conference or Workshop Item |
Palavras-chave: Irrigation control; Water. |
| Ano: 2014 |
URL: http://eprints.nwisrl.ars.usda.gov/1582/1/1538.pdf |
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| Tarkalson, D.D.; King, B.A.; Bjorneberg, D.L.; Taberna, J.P.. |
| Research studies have shown that planting potatoes (Solanum tuberosum L.) in a bed configuration can improve water movement into the potato root zone. However, plant spacing recommendations are needed for potatoes planted in a bed configuration. This study was conducted to evaluate the effect of in-row plant spacing and planting configuration on yield of Russet Burbank, Russet Norkotah, and Ranger Russet potatoes under sprinkler irrigation. For the three varieties, the effect of in-row plant spacing (three spacing treatments) for each planting configuration (4 row conventional ridged-row [4RC], 5 row bed [5RB], and 7 row bed [7RB]), and the effect of planting configuration on total tuber yield, U.S. No. 1 tuber yield, percent No. 1 tubers, average size... |
| Tipo: Article |
Palavras-chave: Irrigation control; Potato. |
| Ano: 2011 |
URL: http://eprints.nwisrl.ars.usda.gov/1418/1/1388.pdf |
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| Bjorneberg, D.L.. |
| Irrigation is essential for global food production. However, irrigation erosion can limit the ability of irrigation systems to reliably produce food and fiber in the future. The factors affecting soil erosion from irrigation are the same as rainfall—water detaches and transports sediment. However, there are some unique differences in how the factors occur during irrigation and in our ability to manage the application of water that causes the erosion. All surface irrigation entails water flowing over soil. Soil type, field slope and flow rate all affect surface irrigation erosion, with flow rate being the main factor that can be managed. Ideally sprinkler irrigation will have no runoff, but application rates on moving irrigation systems can exceed the soil... |
| Tipo: Article |
Palavras-chave: Irrigation control; Site-specific irrigation; Sprinkler irrigation; Soil. |
| Ano: 2013 |
URL: http://eprints.nwisrl.ars.usda.gov/1572/1/1528.pdf |
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| Bjorneberg, D.L.. |
| Irrigation applies water to soil to improve crop production. The three main methods of irrigation are surface, sprinkler and micro. Surface irrigation is used on 85% of the irrigated land in the world. It generally requires lower capital investment because the soil conveys water within the field, rather than pipes or tubing used for sprinkler or microirrigation. Water application is more controlled with sprinkler and microirrigation and these irrigation methods can be automated easier than surface irrigation. There are many variations of irrigation methods and types of irrigation equipment. The purpose of this article is to describe the irrigation methods primarily used for agricultural production. |
| Tipo: Article |
Palavras-chave: Dryland crops; Irrigation control; Sprinkler irrigation; Soil; Water. |
| Ano: 2013 |
URL: http://eprints.nwisrl.ars.usda.gov/1568/1/1524.pdf |
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| King, B.A.; Winward, T.W.; Bjorneberg, D.L.. |
| Sprinkler drop size distribution and associated drop velocities have a major influence on sprinkler performance in regards to application intensity, uniformity of water application, wind drift, evaporation losses and kinetic energy transferred to the soil surface. Sprinkler drop size measurements are either labor intensive or require use of expensive equipment, both of which limit data availability. Sprinkler drop velocity data are more limited than drop size data due to measurement difficulty and associated cost of labor and instrumentation. An economical laser instrument commercially marketed for real-time rainfall measurements as a Laser Precipitation Monitor (LPM) was used to measure drop size and velocity from ten moving spray-plate type... |
| Tipo: Article |
Palavras-chave: Irrigation control; Sprinkler irrigation. |
| Ano: 2010 |
URL: http://eprints.nwisrl.ars.usda.gov/1564/1/1520.pdf |
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| Registros recuperados: 23 | |
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