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<br /> <br />Auditor tal<ing a soil sample using a soil probe <br /> <br />Appendix C: Soil Characteristics <br /> <br />Perform Calculations: In order to find the precipitation rate and distribution uniformity <br />for the zones tested, calculations must be made using the measurements acquired from <br />the catch cup tests. The following are the formulas used: <br /> <br />· Precipitation Rate == (Average of the total number of catch cup volumes x 60) / <br />number of minutes the test ran <br /> <br />· Distribution Uniformity == Average of the lowest 25% of catch cup volumes / <br />Average of the total number of catch cup volumes X 100 <br /> <br />Determine an appropriate watering schedule: Using the information gathered <br />throughout the irrigation inspection, an appropriate watering schedule was developed for <br />the customer for their current irrigation system. Watering intervals change throughout the <br />season because the water requirements change for plants as the seasons progress. <br />Through analysis of historic Evapotranspiration (ET) data and soil type, it has been <br />determined that turf should be watered every four days in May, every three days in June, <br />July and August, every six days in September and every ten days in October or until the <br />end of the irrigation season. The duration of watering should be l<ept the same, with only <br />the intervals between watering changing. <br /> <br />When turf is grown in clay soil, is planted on a slope, or is watered by sprinl<lers with a <br />high precipitation rate, water infiltrates the soil more slowly than it is delivered. This in <br />turn, causes runoff and/or puddling, creates waste, and prevents the turf from receiving <br />all of the moisture and oxygen it requires. Therefore, depending on the type of soil, the <br />severity of slope found on the site, and the precipitation rate of the sprinl<lers, cycling <br />may be recommended. <br />The term cycling refers to running sprinklers repeatedly within an irrigation interval to <br />allow for better water absorption. When a system is cycled, the total number of minutes <br />being watered is divided into several shorter watering times. Individual zones are turned <br />on and off multiple times within an irrigation interval, with rest periods of about an hour <br />between each cycle; this practice allows the water to percolate deeper into the soil profile. <br /> <br />12 <br />