The Impact of Farm Size on Irrigation Practices and On-Farm Irrigation Efficiency in the Elephant Butte Irrigation Distr - PowerPoint PPT Presentation

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The Impact of Farm Size on Irrigation Practices and On-Farm Irrigation Efficiency in the Elephant Butte Irrigation Distr

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  1. The Impact of Farm Size on Irrigation Practices and On-Farm Irrigation Efficiency in the Elephant Butte Irrigation District Rhonda Skaggs & Zohrab Samani New Mexico State University

  2. Structure of U.S. Agriculture • Majority of production on few farms • Off-farm work • Retirement or residential/lifestyle farms • 54% of all U.S. farms • 7.8% of value of production • Urban fringe agriculture • Irrigated river valleys in the West

  3. Irrigation in the West • 92% of consumptive water use • Increased competition for water supplies • Municipal • Industrial • Environmental • Increased irrigation efficiency? • Technologies or techniques

  4. Elephant Butte Irrigation District • Irrigated farms increased 70%, 1974-1997 • Growth in small farms, urban fringe • Dualistic structure pecan production • This research… • Relationship between farm size & irrigation practices, efficiency • Potential responses to incentives & water marketing • Data for 340 pecan orchards

  5. Irrigation Duration… • Hours / acre / irrigation • Indicator of irrigation efficiency • Deep percolation losses • Long durations due to • Highly permeable soils • Low discharge at farm turnout (infrastructure) • Surface roughness, unleveled fields • Guideline = 0.5 hrs/ac/irrigation

  6. Field Verification • Low flows • Small on-farm turnouts • Long fields, rough surfaces • Inadequate infrastructure • Easements, access, common property • Irrigation • Recreation • Tradition • Lifestyle • Meditation

  7. Findings… • Overdelivery to small farms • Underdelivery to large farms • Delivery losses or on-farm application? • Small orchard nut production • 161 lbs / acre-foot • Large orchard nut production • 300 lbs / acre-foot

  8. Next step… • Not feasible to survey producers • More field measurements & “conversations” with water users • Programming models for different farms • “They don’t want to spend any money.” • “I’m retired, what else have I got to do?” • “I like to listen to the water.” • Objective functions?

  9. EBID Distribution of Crops