Controlling Variable Rate Applications on Self-propelled Irrigation Systems

2015 ◽  
pp. 911-911
Author(s):  
G.W. Buchleiter ◽  
H.R. Duke ◽  
D.F. Heermann
Keyword(s):  
Variable Rate ◽  
Irrigation Systems

scholarly journals Adoption of site-specific variable rate sprinkler irrigation systems

2012 ◽  
Vol 31 (4) ◽  
pp. 871-887 ◽  
Author(s):  
Robert G. Evans ◽  
Jake LaRue ◽  
Kenneth C. Stone ◽  
Bradley A. King
Keyword(s):  
Sprinkler Irrigation ◽  
Variable Rate ◽  
Irrigation Systems ◽  
Site Specific ◽  
Specific Variable

<i>MOPivot Tool to Define Management Zones for Center Pivot Variable Rate Irrigation Systems</i>

2021 ◽  
Author(s):  
Anh T. Nguyen ◽  
Allen L. Thompson ◽  
Kenneth A. Sudduth ◽  
Earl D. Vories
Keyword(s):  
Variable Rate ◽  
Irrigation Systems ◽  
Management Zones ◽  
Center Pivot ◽  
Variable Rate Irrigation

scholarly journals Identifying Advantages and Disadvantages of Variable Rate Irrigation: An Updated Review

2019 ◽  
Vol 35 (6) ◽  
pp. 837-852 ◽  
Author(s):  
Susan A O’Shaughnessy ◽  
Steven R. Evett ◽  
Paul D. Colaizzi ◽  
Manuel A Andrade ◽  
Thomas H. Marek ◽  
...  
Keyword(s):  
Water Conservation ◽  
Crop Production ◽  
Nutrient Management ◽  
Irrigation Management ◽  
Sprinkler Irrigation ◽  
Variable Rate ◽  
Economic Returns ◽  
Irrigation Systems ◽  
Advantages And Disadvantages ◽  
Variable Rate Irrigation

Abstract. Variable rate irrigation (VRI) sprinklers on mechanical move irrigation systems (center pivot or lateral move) have been commercially available since 2004. Although the number of VRI, zone or individual sprinkler, systems adopted to date is lower than expected there is a continued interest to harness this technology, especially when climate variability, regulatory nutrient management, water conservation policies, and declining water for agriculture compound the challenges involved for irrigated crop production. This article reviews the potential advantages and potential disadvantages of VRI technology for moving sprinklers, provides updated examples on such aspects, suggests a protocol for designing and implementing VRI technology and reports on the recent advancements. The advantages of VRI technology are demonstrated in the areas of agronomic improvement, greater economic returns, environmental protection and risk management, while the main drawbacks to VRI technology include the complexity to successfully implement the technology and the lack of evidence that it assures better performance in net profit or water savings. Although advances have been made in VRI technologies, its penetration into the market will continue to depend on tangible and perceived benefits by producers. Keywords: Center pivots, Crop water use efficiency, Irrigation, Management zones, Moving sprinkler irrigation systems, Precision irrigation, Sensor based systems.

Variable-Rate Irrigation Uniformity Model for Linear-Move Sprinkler Systems

2021 ◽  
Vol 64 (4) ◽  
pp. 1295-1302
Author(s):  
Junping Liu ◽  
Umair Gull ◽  
Daniel H. Putnam ◽  
Isaya Kisekka
Keyword(s):  
Simulation Model ◽  
Irrigation System ◽  
Sprinkler Irrigation ◽  
Application Rate ◽  
List Type ◽  
Variable Rate ◽  
Irrigation Systems ◽  
Sprinkler Systems ◽  
Irrigation Uniformity ◽  
Variable Rate Irrigation

HighlightsUsing different nozzle sizes on a linear-move sprinkler irrigation system is a simple method for implementing VRI.This study established a variable-rate sprinkler irrigation model for a linear-move system with different nozzles.Uniformity parameters were predicted for different tests, and prediction accuracy ranged from 1.6% to 13.0%.The simulation model can be applied to other sprinkler systems with variable-rate irrigation.Abstract. Variable-rate irrigation (VRI) can vary the application rate by either changing the amount of water flowing through sprinkler nozzles (zone control) or varying the speed of a moving irrigation system across parts of a field, referred to as speed/sector control. The uniformity of sprinkler irrigation in each management zone under VRI directly affects crop growth and yield. The use of different nozzle diameters on a linear-move sprinkler irrigation system is a simple and affordable method for achieving VRI. There are few studies on modeling the uniformity of VRI on linear-move sprinkler irrigation systems. In this study, a cubic spline difference-value model was used to simulate the variable-rate water distribution and uniformity of a linear-move system. Nine tests were designed to evaluate VRI uniformity with different nozzle diameters. A simulation and corresponding field experiments were carried out. The application rate of the simulation model was higher than the experimental values because of wind drift. The uniformity coefficients of the simulation with nozzle diameters of 1.98, 2.97, and 4.17 mm in tests 1, 2, and 3 were 86.56%, 85.24%, and 79.94%, respectively. The uniformity coefficients of the VRI simulations with combinations of nozzle diameters in tests 4 through 9 were 76.89%, 80.70%, 76.67%, 69.58%, 76.64%, and 81.87%, respectively. The smallest error between the simulation and experiment was 1.6%, and the largest error was 13.0%. The simulation model and prediction method can be applied to other sprinkler irrigation systems. Keywords: Linear move, Simulation model, Sprinkler irrigation, Uniformity, VRI.

Homeowners’ Preferences for Smart Irrigation Systems and Features

EDIS ◽  
2020 ◽  
Vol 2020 (5) ◽  
pp. 5
Author(s):  
Hayk Khachatryan ◽  
Alicia Rihn ◽  
Dong Hee Suh ◽  
Michael Dukes
Keyword(s):  
Water Use ◽  
Water Policy ◽  
Resource Economics ◽  
Irrigation Systems ◽  
Policy Makers ◽  
Fact Sheet ◽  
Drought Conditions ◽  
Economics Department ◽  
Irrigation Technologies

Drought conditions make landscape irrigation and reducing water use top-of-mind for many Floridians. Encouraging wise water use is of particular importance to the smart irrigation industry and water policy makers. This 5-page fact sheet written by Hayk Khachatryan, Alicia Rihn, Dong Hee Suh, and Michael Dukes and published by the UF/IFAS Food and Resource Economics Department pinpoints key attributes and barriers affecting consumers' irrigation purchases and their adoption of smart irrigation technologies. https://edis.ifas.ufl.edu/fe1080

Identification and Management of Clustered Pellitory (Parietaria praetermissa) in Citrus Groves

EDIS ◽  
2019 ◽  
Vol 2019 (5) ◽  
pp. 3
Author(s):  
Ramdas Kanissery ◽  
Biwek Gairhe ◽  
Brent Sellers ◽  
Steve Futch
Keyword(s):  
Drip Irrigation ◽  
Early Summer ◽  
Irrigation Systems ◽  
Spray Pattern ◽  
Citrus Groves ◽  
Low Volume ◽  
Florida Citrus ◽  
Heavy Infestation

In Florida, clustered pellitory is becoming a troublesome weed for citrus, especially from the winter through early summer. Inadequate management of this weed can result in its heavy infestation in tree rows and can interrupt the spray pattern of low-volume drip irrigation systems. This new 3-page publication of the UF/IFAS Horticultural Sciences Department will assist Florida citrus growers with proper identification of clustered pellitory and with adoption of adequate and timely strategies to manage this weed in their groves. Written by Ramdas Kanissery, Biwek Gairhe, Brent Sellers, and Steve Futch. https://edis.ifas.ufl.edu/hs1341

Replacement of Sub Minors With Pressurized Irrigation Systems: In Canal Command Area

2012 ◽  
Vol 3 (4) ◽  
pp. 1-2
Author(s):  
Monali Patel ◽  
◽  
Sahita I Waikhom ◽  
Dr. P.G. Agnihotry Dr. P.G. Agnihotry
Keyword(s):  
Command Area ◽  
Irrigation Systems ◽  
Pressurized Irrigation ◽  
Canal Command ◽  
Canal Command Area
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