Results 211 to 220 of about 19,019 (261)

Center Pivot Irrigation Systems

2016
A center pivot irrigation system is a movable pipe structure that rotates around a central pivot point connected to a water supply. Center pivot irrigation systems are the most popular sprinkler irrigation systems in the world because of their high efficiency, high uniformity, ability to irrigate uneven terrain, and low capital, maintenance, and ...
Peter Waller, Muluneh Yitayew
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CENTER PIVOT IRRIGATION ATTACHED SPRAYER

Applied Engineering in Agriculture, 1997
Sprayers were designed and installed on a four-tower and a single-tower center pivot irrigation system. The center pivot-attached sprayer systems use micro-irrigation equipment to reduce investment costs and provide ease of installation. Water application uniformity was determined with a computer simulation model and an aircraft spray pattern ...
null H. R. Sumner, null P. M. Garvey, null D. F. Heermann, null L. D. Chandler   +3 more
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CENTER-PIVOT AUTOMATIZATION FOR AGROCHEMICAL USE

IFAC Proceedings Volumes, 2002
Abstract This paper presents an agrochemical application system that could be incorporated to existing irrigating center-pivots. The system consists in a hydraulic circuit with emitters dose controlled with variable valve timing. The electronic control system has been designed to be modular and distributed along the pivot with a main algorithm based ...
J. Palacín, J.A. Salse, X. Clua, J. Arnó, C. Zanuy   +4 more
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Using Center Pivots for Research

Journal of Irrigation and Drainage Engineering, 1988
Research to determine crop water-production functions normally involves random block designs or a line sprinkler source. Both of these setups have disadvantages that can largely be overcome by using modified center pivots. The otraveling tricklero center-pivot modification uses a series of small adjustable emitters (tricklers) to apply water.
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Center Pivot Classification with Deep Residual U-NET

IGARSS 2020 - 2020 IEEE International Geoscience and Remote Sensing Symposium, 2020
Center pivots are a modern irrigation technique mainly applied in precision agriculture, once it has high efficiency in water consumption and low labor workers when compared to traditional irrigation methods. Knowing their location is valuable since monitoring, evaluating, and estimating essential features in the lands becomes easier, remote sensing is
Anesmar Olino de Albuquerque, Pablo Pozzobon de Bem, Rebeca dos Santos de Moura, Osmar Luiz Ferreira de Carvalho Jr., Pedro Henrique Guimarães Ferreira, Cristiano Rosa Silva, Roberto Arnaldo Trancoso Gomes, Renato Fontes Guimarães, Osmar Abílio de Carvalho Jr.   +8 more
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Dynamic Adjustment of Center Pivot Nozzle Height: An Evaluation of Center Pivot Water Application Pattern and the Coefficient of Uniformity

Applied Engineering in Agriculture, 2020
Abstract.This study assesses the potential of dynamic nozzle height adjustment for overhead irrigation systems. This system would maintain the nozzle or emitter a constant distance above the crop canopy throughout the growing season and would dynamically respond to variability in canopy height across the field.
Hadi A. Al-agele, D. M. Mahapatra, Clarence Prestwich, Chad W Higgins   +3 more
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Selecting Sprinkler Packages for Center Pivots

5th National Decennial Irrigation Conference Proceedings, 5-8 December 2010, Phoenix Convention Center, Phoenix, Arizona USA, 2010
Abstract: Center pivots are the primary method of irrigation across the Great Plains. Center pivot irrigation is also the fastest growing method of irrigation in the United States and around the world. Pivots have the potential to be very efficient and uniform if sprinkler devices are properly selected for local field conditions.
Martin, Derrel L., Kranz, William L., Thompson, Allen L., Liang, Hong   +3 more
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Rice Production with Center Pivot Irrigation

Applied Engineering in Agriculture, 2013
While continuous-flood irrigation, the most common method for U.S. rice production, can have a fairly high irrigation application efficiency, factors such as soil variability and the size of most Mid-South farming operations often combine to reduce the efficiency.
null E. D. Vories, null W. E. Stevens, null P. L. Tacker, null T. W. Griffin, null P. A. Counce   +4 more
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Understanding Center Pivot Application Rate

2019
Explains how a center pivot’s flow rate and speed determine how much water it applies, and why application can cause runoff even when the total depth seems small. Clarifies the difference between the average application rate over the whole pivot circle and the much higher “instantaneous” rate under the outer spans, which can overwhelm infiltration ...
Brian Leib, Timothy Grant
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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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