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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 24 of 34 <br /> <br />Further Analysis of Other Crops: <br />Sugar Beets. The Task Memo 59.1 crop curve for sugar beets suggests that SCS TR <br />estimate consumptive use. Findings from our study of ARS 1275 suggest the same. However, the <br />coefficients from Task Memo 59.1 present an unusual shape that is not bell shaped and <br />the later portion of the growing season <br /> <br />Figure 22 – Comparison of crop curves for sugar beets <br /> <br />Corn. The Task Memo 59.1 crop curve for corn suggests that the ASCE method <br />similar to the SCS TR-21 method. Findings from our study of ARS 1275 suggest the same. However, the <br />coefficients from Task Memo 59.1 present an unusual shape that is not bell shaped and is suspicious in <br />the later portion of the growing season <br /> <br />Figure 23 – Comparison of crop curves for corn <br /> <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 />Cr <br />o <br />p <br /> <br />G <br />r <br />o <br />w <br />t <br />h <br /> <br />S <br />t <br />a <br />g <br />e <br /> <br />C <br />o <br />e <br />f <br />f <br />i <br />c <br />i <br />e <br />n <br />t <br />, <br /> <br />k <br />c <br />0 <br />0.2 <br />0.4 <br />0.6 <br />0.8 <br />1 <br />1.2 <br />1.4 <br />0 20 <br />Cr <br />o <br />p <br /> <br />G <br />r <br />o <br />w <br />t <br />h <br /> <br />S <br />t <br />a <br />g <br />e <br /> <br />C <br />o <br />e <br />f <br />f <br />i <br />c <br />i <br />e <br />n <br />t <br />, <br /> <br />k <br />c <br />Issues with Selecting an Appropriate Crop Growth Stage Coefficient for the SCS Mod. Blaney-Criddle Eqn. <br />Crops: <br />Task Memo 59.1 crop curve for sugar beets suggests that SCS TR <br />estimate consumptive use. Findings from our study of ARS 1275 suggest the same. However, the <br />coefficients from Task Memo 59.1 present an unusual shape that is not bell shaped and <br />the later portion of the growing season, which may reflect temperature effects during the fall <br />crop curves for sugar beets <br />The Task Memo 59.1 crop curve for corn suggests that the ASCE method results in values very <br />21 method. Findings from our study of ARS 1275 suggest the same. However, the <br />coefficients from Task Memo 59.1 present an unusual shape that is not bell shaped and is suspicious in <br />wing season, which may reflect temperature effects during the fall <br />crop curves for corn <br />40 60 80 <br />Percent of Growing Season <br />SCS TR-21 Sugar Beet <br />Task Memo 59.1 <br />ARS 1275 (Logan, UT) <br />Average from ARS 1275 <br />40 60 80 <br />Percent of Growing Season <br />SCS TR-21, Corn (grain) <br />Task Memo 59.1 <br />ADJ. Davis, CA <br />Criddle Eqn. <br />Task Memo 59.1 crop curve for sugar beets suggests that SCS TR-21 will over- <br />estimate consumptive use. Findings from our study of ARS 1275 suggest the same. However, the <br />coefficients from Task Memo 59.1 present an unusual shape that is not bell shaped and is suspicious in <br />which may reflect temperature effects during the fall. <br /> <br />results in values very <br />21 method. Findings from our study of ARS 1275 suggest the same. However, the <br />coefficients from Task Memo 59.1 present an unusual shape that is not bell shaped and is suspicious in <br />temperature effects during the fall. <br /> <br />100 <br />100