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| Registros recuperados: 36 | |
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| King, B.A.; Bjorneberg, D.L.. |
| A 4-wheeled commercial irrigation boom was modified for use in investigating center pivot design and management effects on infiltration, runoff and erosion of specific soil types. The center pivot simulator used a hydraulic winch attached to the front of a tractor for mobilization and controlled travel speed. A 3 inch diameter 300 ft drag hose is used to supply water to the center pivot simulator. The center pivot simulator was used to conduct two studies to investigate infiltration, runoff and erosion differences of common commercially available center pivot sprinkler types on a Portneuf silt loam soil. Sprinklers used in the first study were: 1) Nelson R3000 with brown plate, 2) Nelson R3000 with red plate, 3) Nelson S3000 with purple plate, and... |
| Tipo: Conference or Workshop Item |
Palavras-chave: Erosion; Infiltration; Center pivot; Erosion; Mass Import - autoclassified (may be erroneous). |
| Ano: 2007 |
URL: http://eprints.nwisrl.ars.usda.gov/965/1/1236.pdf |
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| Bjorneberg, D.L.; King, B.A.; Nelson, Nathan; Lee, J.H.. |
| Sediment and associated nutrients flowing to the Snake River with furrow irrigation runoff and unused irrigation water have been a concern in the Twin Falls irrigation tract in southern Idaho. Converting furrow irrigated fields to sprinkler irrigation is one practice that has been promoted, and received financial assistance, to reduce sediment loss. Five small watersheds (330 to 1480 acres) with 10 to 70% sprinkler irrigation were monitored from 2005 to 2008 to determine if converting to sprinkler irrigation reduced sediment and nutrient losses from these watersheds. Eliminating runoff from furrow irrigated fields by converting to sprinkler irrigation will reduce sediment and nutrient losses from fields. However, there were no significant correlations... |
| Tipo: Conference or Workshop Item |
Palavras-chave: Runoff losses; Nutrient losses; Nutrients; Sediment. |
| Ano: 2009 |
URL: http://eprints.nwisrl.ars.usda.gov/1587/1/1544.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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| 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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| King, B.A.; Bjorneberg, D.L.. |
| The kinetic energy of discrete water 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 the seasonal runoff and erosion hazard. The size and velocity of drops from common rotating spray-plate sprinklers center-pivot sprinklers with flow rates of approximately 40 and 20 L/ min were measured using a laser in the laboratory. The data were used to... |
| Tipo: Conference or Workshop Item |
Palavras-chave: Sprinkler irrigation; Center pivot. |
| Ano: 2010 |
URL: http://eprints.nwisrl.ars.usda.gov/1426/1/1396.pdf |
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| King, B.A.; Winward, T.W.; Bjorneberg, D.L.; Wall, R.W.. |
| Peak water application rate in relation to soil water infiltration rate and soil surface storage capacity is important in the design of center pivot sprinkler irrigation systems for efficient irrigation and soil erosion control. Measurement of application rates of center pivot irrigation systems has traditionally used tipping bucket rain gauges. Calculation of application rate from tipping bucket rain gauge measurements restricts computed application rate to a discrete multiple of the rain gauge resolution and time interval. This limits the resolution of application rate measurement, especially for time intervals less than 15 minutes. A collector was designed to measure time variant high intensity sprinkler application rates under field conditions with... |
| Tipo: Article |
Palavras-chave: Sprinkler irrigation; Soil; Water. |
| Ano: 2010 |
URL: http://eprints.nwisrl.ars.usda.gov/1565/1/1521.pdf |
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| King, B.A.; Bjorneberg, D.L.. |
| The operational characteristics of center pivot sprinklers are well documented but few studies have been conducted to evaluate the effects that operating characteristics of a particular sprinkler have on infiltration, runoff, and erosion for specific soil types. The objective of this study was to evaluate potential runoff and erosion from four commercial center pivot sprinklers on three widely distributed, south central Idaho soils. A modified commercial irrigation boom system was used to emulate center pivot irrigation on experimental runoff plots. Sprinklers used in the study were: 1) Nelson R3000 with brown plate, 2) Nelson R3000 with red plate, 3) Nelson S3000 with purple plate, and 4) Senninger I-Wob with standard 9-groove plate. Based on... |
| Tipo: Article |
Palavras-chave: Sprinkler irrigation; Erosion; Runoff losses; Center pivot. |
| Ano: 2011 |
URL: http://eprints.nwisrl.ars.usda.gov/1424/1/1394.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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| King, B.A.; Tarkalson, D.D.; Bjorneberg, D.L.; Taberna, J.P, Jr.. |
| Conversion of potato ridged-row planting systems to wide bed planting systems may increase water and nitrogen use efficiency in commercial irrigated potato production systems by reducing the amount of irrigation water and water applied nitrogen fertilizer bypassing the potato root zone. Wide bed planting systems consist of planting multiple rows on a wide bed with 20 to 35% higher plant population than found in conventional ridgedrow planting systems. The objective of this study was to evaluate the effect planting system has on yield response of ‘Russet Norkotah’ potato to irrigation and nitrogen. Planting systems evaluated were (1) conventional ridgedrow with dammer-diking; (2) 3.7 m wide bed with five potato rows spaced 66 cm between adjacent rows... |
| Tipo: Article |
Palavras-chave: Practical farm efficiency; Sprinkler irrigation; Potato; Nitrogen. |
| Ano: 2011 |
URL: http://eprints.nwisrl.ars.usda.gov/1425/1/1395.pdf |
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| King, B.A.; Bjorneberg, D.L.. |
| The kinetic energy of discrete water drops impacting a bare soil surface generally leads to a drastic reduction in water infiltration rate due to formation of a seal on the soil surface. 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, especially when the soil is not protected by crop residue cover. Droplet kinetic energy of seven commercial off-center action rotating spray-plate sprinklers was characterized over a range of flow rates and pressures. Sprinkler droplet kinetic energy was characterized using two methods; droplet kinetic energy per unit sprinkler discharge and droplet kinetic energy applied per unit water depth... |
| Tipo: Article |
Palavras-chave: Sprinkler irrigation; Center pivot. |
| Ano: 2012 |
URL: http://eprints.nwisrl.ars.usda.gov/1457/1/1422.pdf |
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| King, B.A.; Bjorneberg, D.L.. |
| The marked reduction in infiltration rate caused by formation of a soil surface seal is a well known phenomenon but often ignored in infiltration models. The effect sequential water application events have on infiltration rate and soil surface seal formation has rarely been investigated. The objective of this study was to investigate the effect sequential water application events have on the infiltration rate of a Portneuf silt loam soil with and without water droplet impact. The Portneuf silt loam soil developed a soil surface seal that reduced infiltration rate both with and without droplet impact on the bare soil surface. When the soil surface was protected during the first rainfall event, drying the soil did not increase infiltration rate for... |
| Tipo: Conference or Workshop Item |
Palavras-chave: Sprinkler irrigation; Infiltration; Center pivot. |
| Ano: 2012 |
URL: http://eprints.nwisrl.ars.usda.gov/1533/1/1467.pdf |
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| Registros recuperados: 36 | |
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