Total Salt, Specific Ion, and Fertilizer Element Concentrations and Balances in the Irrigation and Drainage Waters of the Twin Falls Tract in Southern Idaho

Carter, D.L. and Robbins, C.W. and Bondurant, J.A. (1973) Total Salt, Specific Ion, and Fertilizer Element Concentrations and Balances in the Irrigation and Drainage Waters of the Twin Falls Tract in Southern Idaho. USDA-ARS No. ARS-W-4. 37 pp.

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Abstract

Public interest in environmental quality has aroused concern and speculation about the effects of irrigation and the application of fertilizers on the quality of surface and ground waters. The Environmental Pollution Panel of the President's Science Advisory Committee, and other groups, have recommended that high priority be given to investigating the sources of total salts, specific ions, and nutrients that enter surface and ground waters. One source is drainage from irrigated areas or irrigation return flows. More information is needed about the quality of irrigation return flows under various management systems and climatic environments and on representative soil types. Such information is basic for determining practices to improve the quality of return flows and in planning new irrigation projects. The NO?-N, PO?-P, and total salt concentrations were measured in irrigation and drainage waters on the Twin Falls Canal Company irrigation tract in southern Idaho. This information was combined with a water balance to estimate input-output balances for these components, and results have been reported. The input-output balances for other specific ionic components have been computed for the irrigation and drainage waters of that tract. Results from these investigations and detailed information on specific ion concentrations, temperature and flow characteristics of drainage tunnels, tile-relief well complexes, and large surface drains are reported herein.

Item Type: Technical Bulletin
NWISRL Publication Number: 0253
Subjects: Soil > Amendments > Fertilizer
Mass Import - autoclassified (may be erroneous)
Depositing User: Dan Stieneke
Date Deposited: 20 Nov 2010 21:57
Last Modified: 17 Feb 2017 19:49
Item ID: 1101
URI: https://eprints.nwisrl.ars.usda.gov/id/eprint/1101

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