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<br />tv outflow monitoring equipment: 1.2" broadcrested weir, <br />r,) stilling well, flow sensor with Omnidata 11.5 datapod. <br />r' soil moisture monitoring: soil moisture readings were taken <br />00 using an Aquateer, oven dried samples, and a Tile probe. <br /> <br />This site was a CSUCE demonstration plot, also researching <br />water quality and fertigation. The landowner initiated the <br />communications requesting that we assist him to address <br />these issues. His interests were also demonstrated by his <br />employment of others to assist with research. <br /> <br />Sites 25 and 26 <br />NOTE: This cooperator operated a surge <br />valve provided by CSUCE. <br />NRCS/CSUCE cooperative project. <br />Site 25 - Four acres were irrigated <br />with conventional gated pipe <br />Site 26 - Seven acres were irrigated with surge <br />gated pipe. <br />farm acres: 1.50 (cropland) <br />location: Montrose County, 4 miles South and West of Olathe <br />on County Road - 5700. <br />field acres: 4 and 7 crop: Corn for silage <br />soils: Billings silty clay loam with 1% slope <br />irrigation system: Underground pipeline to gated pipe <br />inflow monitoring equipment: Flow meter <br />outflow monitoring equipment: 12" broadcrested weir, <br />stilling well, flow sensor with Omnidata 11.5 datapod - <br />operational during all irrigations <br />soil moisture monitoring: soil moisture readings were taken <br />using, an Aquateer, oven dried samples, and a Tile probe. <br /> <br />Comparison of irrigation water management and crop yields <br />was done on both of these fields. <br /> <br />statements and Cha1.1enges <br /> <br />The following summary statements are drawn from LGCU <br />monitoring activities: <br /> <br />1) Over irrigation seems to be a common practice in fields <br />which were monitored, perhaps due in part to a.normally <br />abundant supply of inexpensive irrigation ,water. <br /> <br />2) Low irrigation efficiencies are due to irrigation <br />water being applied prior to the soil moisture reaching <br />the 50% available water stage and due to applications <br />which continue after field capacity has been reached. <br /> <br />3) The 1995 monitored sites for surface irrigated, annual <br />crops indicate that, on the average, about 22% of the <br />seasonal deep percolation losses occurred during the <br />first irrigation event. The GV 1994 value was 28%. <br /> <br />12 <br />