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ARS Home » Plains Area » Bushland, Texas » Conservation and Production Research Laboratory » Soil and Water Management Research » Research » Publications at this Location » Publication #231823
Title: Crop production and economics in Northwest Kansas as related to irrigation capacity

Author
item LAMM, FREDDIE - KANSAS STATE UNIV
item STONE, LOYD - KANSAS STATE UNIV
item O'BRIEN, DANIEL - KANSAS STATE UNIV

Submitted to: Applied Engineering in Agriculture
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 6/1/2007
Publication Date: 10/1/2007
Citation: Lamm, F.R., Stone, L.R., O'Brien, D.M. 2007. Crop production and economics in Northwest Kansas as related to irrigation capacity. Applied Engineering in Agriculture. 23(6):737-745.

Interpretive Summary:

Technical Abstract: Crop production and economics of corn, grain sorghum, soybean, and sunflower under irrigated and dryland conditions were simulated using 34 years (1972-2005) of weather data in Northwest Kansas. Irrigation system capacities ranged from 2.5 to 8.5 mm/day. The simulated long-term annual average net irrigation requirements for corn, grain sorghum, soybean, and sunflower were 375, 272, 367, and 311 mm, respectively. Assuming a 95% application efficiency (Ea), the average long-term crop yield is approximately 12.9, 8.2, 4.4, and 3.2 Mg/ha for corn, grain sorghum, soybean, and sunflower, respectively. Although corn is currently the predominant irrigated crop in western Kansas, projections for the year 2006 indicate soybean is a more profitable alternative. Net irrigation requirements for soybean are only about 2% lower than corn, so a shift to soybean will not result in significant water conservation. If the price of corn increased just 10% relative to stable prices for the other crops, it would become the most profitable irrigated crop. This indicates that net return projections are very volatile, subject to changes in crop prices and input costs.