Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 11 of 11 for “"center pivot"”.
-
Automated Water Management for Center Pivot Irrigation Systems
… of a software package that fully automates center pivot irrigation systems on fields planted to com, soybeans and potatoes for years 1986-2005. A total of seven sites from the Central and Northern Plains were chosen for analysis (Akron, CO, Ames, lA, Brookings, SD, Oakes, ND, Ord, NE, Rock …
-
The effects of institutions on innovation : the case of center-pivot irrigation
Thesis. 1978. M.C.P.--Massachusetts Institute of Technology. Dept. of Urban Studies and Planning.
-
A knowledge based system for irrigation planning in Virginia
… Irrigation systems considered by the KBS include center-pivot, traveling gun and portable pipe systems. Crops considered are field corn, soybeans, and peanuts. Preliminary evaluation showed that the KBS was able to effectively determine if portable pipe, traveling gun and center pivot irrigation …
-
Collector size effect on the measurement of applied water depth from irrigation systems
Center pivot irrigation systems are used in crop production across the state of Kansas. The American Society of Agricultural and Biological Engineers (ASABE) standard on uniformity testing of a center pivot system calls for collectors to be used to measure the water depth emitted by the irrigation …
-
Optimal economic combination of irrigation technology and cotton varieties on the High Plains of Texas
… of the adoption of subsurface irrigation vs. center pivot irrigation, determine the farm level economic impact of the adoption of new, higher yielding and higher quality varieties, and determine the optimal combinations of applied irrigation water and variety selection for irrigated cotton …
-
A methodology for assessing the feasibility of riparian-based irrigation systems
… Econometric models for various ranges for center pivot, traveling gun, big gun, and portable pipe irrigation systems were utilized in the procedure. The developed procedure was applied to the Pamunkey River area in Eastern Virginia. Projections on cumulative irrigated acreage, pumping …
-
An analysis of water consumption rates in agricultural irrigation systems
… model which describes the water loss from the center-pivot and lateral move irrigation systems is used. Again it is found that wind and entrainment effects result in significant water losses.
-
Irrigation cost models to assess the feasibility and potential expansion of large-scale riparian irrigation in Virginia
… portable pipe, fixed big gun, traveling gun, and center pivot irrigation systems. The more economically important variables impacting fixed and variable irrigation costs were randomized in a uniform and independent distribution using the random number generator in the BASIC language. The design …
-
Evaluation of Deficit Irrigation Strategies for Corn
… Management Software was used to simulate center pivot irrigation and com growth and yield at seven locations across the Great Plains. Sixteen to 24 years of weather data were used for each site. Thirty irrigation strategies were evaluated across three soil water holding capacities and …
-
Laboratory Test Program of Rotary Plate Sprinklers
… in the selection of sprinkler packages for center pivot irrigation systems. The goal of system design is to apply water uniformly and efficiently. Application efficiency is a measure of how much of the irrigation application is available for the crop and is influenced by evaporation losses, …
-
Producer Preferences for Alternative Irrigation Practices in the Arkansas Delta
<p>We use a bivariate sample selection model to address peer network effects on participation in and/or intensity of use of land being irrigated by alternative irrigation practices in the state of Arkansas. As groundwater in the state becomes more limited, the use of scientific scheduling, …