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<br />measurement needle on the pressure gauge. For rotor zones, a pitot tube is attached to the <br />pressure gauge and is then placed into the stream of water that is emitted from the nozzle. <br />It is sometimes problematic to get an accurate pressure reading for rotor zones due to the <br />nozzle design (there is usually more than one hole that emits water). <br />Visual indicators can also be useful when determining pressure levels. For example, if <br />the pressure is too high, the heads will emit a fine mist. Conversely, if the pressure is too <br />low, the heads will not be able to reach the designed distance (i.e. a spray head that has a <br />nozzle designed to throw 8 feet will only be throwing 3 feet). <br />The proper pressure for fixed heads is between 20 and 30 PSI, while the proper pressure <br />for rotor heads is between 40 and 70 PSI. Drip systems should never be higher than 30 <br />PSI. Each manufacturer will provide proper pressure recommendations for all of their <br />products, as they will vary depending on the model of the head. <br /> <br /> <br />-- - --- - -",,---~~~~ . <br /> <br />~ 4 ~ . j ~,_. J .. -~..~,.."t~ ~"" <br />I t i~ .t(1t~t. ,,0. · ,,",} ..I.. ',> .. II ~~.'!!t. <br />l iI,..A~1 i~~~. i..... ~-6; ~. ~.t ]~~;'-(."'~~'" <br />I ~~c\,...,., .... !~~;r~ X~~~,~.r~"~" <br />.~r~~~.~.,. .~ ~ ~ ~~.~ '",-" ~ <br /> <br />t _ <br /> <br />Pressure gauge on a fixed spray head <br /> <br />Determine Soil Type and Root Depth: A soil sample was collected using a soil probe to <br />determine soil type and root depth. Soil type was categorized as clay, sand, loam or some <br />combination thereof. Soil type directly affects the infiltration rate of water and needs to <br />be considered when determining the frequency and duration of watering times. For a <br />healthy lawn, roots should be a minimum of 6 inches deep. This is accomplished by deep <br />infrequent watering that greatly enhances a lawn's ability to withstand drought conditions <br />and increased intervals between watering. This practice will also make the turf more <br />resistant to disease. <br /> <br />11 <br />