1. Jack Myrick Technical Coordinator Irrigation Efficiencies Grants Program 509.301.2498 jmyrick@scc.wa.gov

2. Limited Irrigation

3. As a result irrigation management for marginal and limited water supply is more critical than ever before. MARGINAL water supply with proper management and efficiencies where still able to meet the crop evapotranspiration. LIMITED when water supplies are restricted so that full evapotranspiration demands can not be met.

4. Irrigation 101 The On-Farm Water Budget ETET RainfallRainfall IrrigationIrrigation Soil “Reservoir”Soil “Reservoir” Irrigation EfficiencyIrrigation Efficiency –Canopy Loss –Spray Evaporative Loss –Wind Drift –Deep Percolation –Runoff –Leaks –Non-Uniform Application

5. Supply and Demand

6. What’s so tough about irrigation? How much water do I need? How often do I water? How long should I water? What type of soils do I have? Is my water applied uniformly?

7. KNOW THE CAPABILITY OF THE IRRIGATION SYSTEM Application rate / inches per hour or inches per day Uniformity Efficiency How often

10. FIX THE LEAKS FIX THE UNIFORMITY

13. KNOW THE SOIL(s) Moisture holding capacity Intake rate Depth

14. KNOW THE CROPS Irrigation requirement Effective root zone MAD Critical growth periods

21. LIMITED IRRIGATION PRACTICES Reduce irrigation during non critical growth stages IWM know ET & soil moisture Residue management Tillage Manage soil water depletion Crop rotation