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MEMORANDUM <br />December 13, 2013 <br />Issues with Selecting an Appropriate Crop Growth Stage Coefficient for the SCS Mod. Blaney <br />Page 10 of 34 <br /> <br />Figure 5 - kc vs. month for <br /> <br />However, further analysis indicates that the <br />Division One. SPDSS Task Memo 59.1 <br />consumptive use for the upper plains region <br />the Task Memo 59.1 curve below the SCS TR <br />shifted to the left along the x-axis. <br /> <br />Figure 6 – Crop curves for Sugar <br /> <br />Data from Logan, UT could be used in many portion of Division 1 without an elevation adjustment. <br />Logan, UT has an approximate elevation of 4 <br /> <br />Location State Crop <br />Logan UT Sugar Beets <br /> Table 9 - kc values for sugar beets, taken from ARS 1275 <br /> <br />0.0 <br />0.2 <br />0.4 <br />0.6 <br />0.8 <br />1.0 <br />1.2 <br />1.4 <br />1.6 <br />4 5 <br />0 <br />0.2 <br />0.4 <br />0.6 <br />0.8 <br />1 <br />1.2 <br />1.4 <br />1.6 <br />0 20 <br />Issues with Selecting an Appropriate Crop Growth Stage Coefficient for the SCS Mod. Blaney-Criddle Eqn. <br />vs. month for Sugar Beets <br />However, further analysis indicates that the data from Logan, UT may better represent sugar beets in <br />Task Memo 59.1 suggests that the SCS TR-21 method over <br />for the upper plains region. When plotted together, the data from Logan, UT <br />elow the SCS TR-21 curve. It appears that the SCS TR-21 curve has been <br /> <br />ugar Beets <br />be used in many portion of Division 1 without an elevation adjustment. <br />Logan, UT has an approximate elevation of 4,534 feet above sea level (1,382m). <br />Elevation Month <br />(m) (ft) MAY JUN JUL AUG SEP OCT <br />Sugar Beets 1,382 4,534 0.484 0.557 0.860 1.022 1.149 1.077 <br />values for sugar beets, taken from ARS 1275 <br />6 7 8 9 10 <br />Huntley, MT <br />Scottsbluff, NE <br />Redfield, SD <br />Logan, UT <br />Average of ARS 1275 <br />SCS TR-21 Sugar Beet <br />40 60 80 <br />SCS TR-21 Sugar Beet <br />Task Memo 59.1 <br />ARS 1275 (Logan, UT) <br />Criddle Eqn. <br /> <br />data from Logan, UT may better represent sugar beets in <br />21 method over-estimates <br />the data from Logan, UT trends with <br />21 curve has been <br /> <br />be used in many portion of Division 1 without an elevation adjustment. <br />OCT <br />1.077 <br />11 <br />100