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1,7 inches (713 depletion was 1.81). <br />Note the prediction of when to begin <br />was an larder-estimation and the last <br />set oxcetded the allowable depletion <br />from Suty 8 to fuly 11, due to much <br />higher than predicted ET demand. <br />In addition to scheduling using ET <br />information, it is recommended that <br />soil water tmonitoring be included as <br />part of the management program. <br />Different soil water monitoring tech- <br />niques are discussed in KSU Fxtension <br />bulletin L-795, Soil Water Measure- <br />7rtent.- An Aid to Irrigation Water <br />managernent <br />SUMMARY <br />Scheduling irrigation by use of ET <br />should be beneficial to irrigators by <br />providing additional management <br />information on their crop needs. ltriga- <br />tion scheduling is a method of deter- <br />mining both the titne of krigatirut <br />application and, within the limits of the <br />flood system distribution, the size of <br />application to make the most efficient <br />use of water. Table 3 of this bulletin <br />could be photocopied and used for <br />scheduling irrigation using the method <br />described. Additional information on <br />improving application efficiency of <br />furrow systems is available in KSU <br />Exttnslon bulletin L-912, Sorge <br />Irrigation and L-913, Managing <br />Furrow Irrigation Systems. <br />Table 7- Soil Water Balance Worksheet <br />Field Example Crop Cirtl <br />Root Zone Depth 3 feet Root Zone Available Water Holding Capacity inches <br />Soil Type Silt Logan % Allowable Depletion SQ *A <br />Available Water Holding Capacity 21) inchea foot Allowable Depletion 3 Q_ .inches <br /> Soil Water Depletion <br /> <br />Date Bflectivo <br />Rainfall <br />Incbcs Net <br />Irrigation <br />inches <br />ETr <br />Inches Stage <br /> <br />04tb K. <br />Crop. <br />Coef 6 ont Crop <br />?c <br />merles <br />Location <br />( <br />Location <br />2 <br />Comments <br />6,19 0.56 6 leaf a29 0.16 1.16 1.16 I- begim'114 to prewem <br />6130 0.22 6 teat 030 OM 123 1.23 exeess depkdm an <br />6131 0.34 7 teat 033 O.i 1 134 1.34 location 2. Sea step 4 <br />7/4 0.22 7 loaf 0.38 OA8 1.42 1.42. for nwe dcail. <br />7/2 0.24 7 teat 0.42 0110 152 1.52 <br />713 0.62 7leaf 0.47 019 1.81 t.81 <br />7/4 1 3" 0.59 a lcat 0.50 0.30 0.00 2.11 <br />715 2 0.49 8leaf 0.57 0,22 0.28 2.39 <br />716 3 0.49 a leaf 0.61 0.30 038 2.69 <br />717 4 0.36 9 teat 0.68 0.24 0.82 2.93 <br />7/8 1 0.35 9 tear 0.71 035 1.07 338 <br />7/9 8 0.22 9 leaf 0.77 0.17 1.24 135 Average S-day <br />7/10 7 025 9lear 6181 0 <br />20 44 <br />1 3 <br />55 , <br />, <br />. <br />. 0.22+.34+.2+.17+.25 <br />7111 1 OAO to leaf OAS 034 1.78 3._89 = 1.18, 1.1815 -.24 <br />7111 9 0125 to leaf 0.87 0.22 2.00 0,89 14.10 • 2A0" <br />7113 10 3" 0.31 low 0.89 0.29 0.00 1.17 3110.2110 - CA" <br />7/14 1 3" O.3S 11 leaf 0.9t 0.72 032. 1.49 allowable depletion 0 <br />7115 2 0,37 11 Ieaf 0.93 0.34 0.66 1111 location 2. Hegin <br />7116 3 0.20 t t Ieaf 095 0.19 O.BS 202 irrigation inunedlatety <br />7117 0.67" 4 0Al 11 teat a97 OAD 0.58 1.75 0.84 0.6 far itmfim 2 <br />Will 5 036 12 kaf 1.00 0.36 0.94 2.11 ?- ~ <br />7119 6 031 12 tear too US t29 2.46 <br />76