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Average winter wheat crop coefficient (Kcr) curve <br />for 2015-2016 at Rocky Ford, CO. <br />y = 2E-16x5 - 2E-12x4 + 5E-09x3 - 5E-06x2 + 0.0018x + 0.2263 <br />R² = 0.8584 <br />0.0 <br />0.2 <br />0.4 <br />0.6 <br />0.8 <br />1.0 <br />1.2 <br />0 500 1000 1500 2000 2500 3000 3500Kcr Cumulative GDD (°C days)