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Line Source Sprinkler for Continuous Variable Irrigation-crop Production Studies¹

ABSTRACT

The design details and a sample set of field test results for a line source sprinkler plot irrigation system are presented. The system produces a water application pattern which is uniform along the length of the plot and continuously, but uniformly variable across the plot.

By applying a fertility variable along a plot (at right angles to the water variable) planted in some test crop, the system offers a convenient means for developing crop production function data. The system test area and water supply are both small. However, the application of the system may be limited by wind and all water application levels within a plot must be supplied at the same irrigation frequency.

¹ Contribution from Utah State Univ. in cooperation with the Utah Agric. Exp. Str., Logan, UT 84322. Journal Paper no. 2049. Supported in part by Grant B121, Utah Center for Water Resources Research, Grant C5189, Consortium for International Develop., Office of Water Research and Technology, USDI and Contract AID-csd-2459 U.S. Agency for International Development.

² Professor and Research Assistants, respectively, Dep. of Soil Science and Biometeorology.

³ Professor, Dep. of Agric. and Irrig. Eng.

Received for publication November 11, 1975. Accepted for publication January 24, 1976.

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