Results 271 to 280 of about 19,097 (313)

Droplet Kinetic Energy from Center-Pivot Sprinklers

5th National Decennial Irrigation Conference Proceedings, 5-8 December 2010, Phoenix Convention Center, Phoenix, Arizona USA, 2010
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 ...
null Bradley A King, null David L Bjorneberg   +1 more
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Economic Design of Center-Pivot Sprinkler Laterals

Journal of Irrigation and Drainage Engineering, 2004
Center-pivot laterals are characterized by important friction loss, so therefore the energy consumption is also significant.
John D. Valiantzas, Nicholas Dercas
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Center-pivot uniformity analysis with variable container spacing

Irrigation Science, 2011
Evaluation procedures for determining water application uniformity under center-pivot sprinkler systems have been documented in various technical publications. The so-called “catch cans” (open containers) are placed along one or more radial legs from the center of the field to obtain sample water application measurements, from which standard ...
N. Marjang, G. P. Merkley, M. Shaban
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A Center Pivot Irrigation Simulator for Pesticide Applications

Transactions of the ASAE, 1982
ABSTRACT DROP size distributions & application rates were measured for a center pivot irrigation (CPI) system. A simulator employing eight stationary nozzles in an in-line configuration was designed to duplicate the CPI system performance. Tests showed for drop size distribu-tions and application rates, the simulator values (weighted average) were ...
null F. J. Pickle, null J. L. Chesness
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Demonstration of Intelligent Center Pivot Irrigation Technology

2014 ASABE Annual International Meeting, 2014
Abstract. Center pivot irrigation systems are predominantly designed to apply a relatively uniform amount of water to fields that are often inherently variable due to factors such as different soil types, topography, or multiple crops. This field variability can result in significantly waste of water and energy, runoff, chemical leaching, and ...
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Deep Percolation under Center Pivots with No-till

5th National Decennial Irrigation Conference Proceedings, 5-8 December 2010, Phoenix Convention Center, Phoenix, Arizona USA, 2010
Percolation of water beneath the plant root zone and subsequent flow in the intermediate vadose zone are important processes that affect not only the efficiency of center-pivot irrigation systems but also the transport of contaminants and return flow to the groundwater.
null D E Eisenhauer, null J H Deck, null S Irmak   +2 more
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Corrosive Ground Water Treatment for Center Pivots

Applied Engineering in Agriculture, 1987
CORROSIVE ground water can drastically reduce the useful life of a center pivot irrigation system. A number of treatment systems were reviewed as potential solutions to the corrosive water problem. Based on this evaluation, a treatment system was developed and tried on three irrigation systems.
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The Center Pivot - The First Irrigation Machine

SAE Technical Paper Series, 1979
<div class="htmlview paragraph">The commercial development of the center pivot irrigation machine has brought the technology of machine design into an area formerly dominated by hydraulics and hydrology. The major attributes of these systems--accommodations to sandy soils and rolling terrain, efficiency in application of water, automation and ...
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California's Reluctant Acceptance of Center Pivot Irrigation

Yearbook of the Association of Pacific Coast Geographers, 1979
CENTER PIVOT TECHNOLOGY is having a greater impact on irrigation farming in America t an a y development sin e the invention of the impulse sprinkler and the introduction of lightweight aluminum pipe. In only a few years, center pivots have appeared on the rural landscape of forty states and are now the single most important type of irrigation in nine ...
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Analyzing Center Pivot Irrigation Investments

Transactions of the ASAE, 1981
null R. A. Schoney, null L. R. Massie
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