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<br />•~~ The soil moisture data correspond closely to the observed precipi- <br />tation patters. For the first two sampling periods (May 3, 17), 15Z or <br />more moisture vas recorded at all depths within the treatments sampled <br />(Appendix B). <br />- By May'31, some differences were noted in soil moisture levels <br />among treatments. The north-facing 2:1 slope treatments shored more <br />eater present near the surface than south-facing 2:1 treatments. Near- <br />surface moisture (5 ® depth) in 2:1 north-facing treatments vas highest <br />tinder excelsior mulch (15Z), follwed by hydromuleh (12Z), and the <br />control (<12Z). However, on south-facing 2:1 slopes the excelsior <br />treatment vas drier deeper is the profile than the hydromuleh and control <br />treatments. Soil moisture levels oa the 2:1 west-faeisg slopes were <br />similar to those on 2:1 north-facing slopes. The vest hydromulch treatment <br />vas drier on the surface than the excelsior treatment on the same vest <br />f <br />aspect. The north sad south 4:1 slope treatments were not analyzed <br />because of measurement errors (see soil temperature discussion).. <br />By Juae 14, all treatments were very dry at all depths. Calibration <br />of moisture blocks is topsoil and refuse material (Appendix C) indicate <br />that electrical resistances of 7 x 105 ohms are associated with soil <br />moisture levels of less thaw 5Z. The maximum resistance that can be <br />__ read from the ohmmeter is 2 a 10° ohms. Off-scale readings for nearly <br />all treatments were takes from Juae 14 through October 14, indicating <br />` that soil moisture levels were probably below SS throughout this period. <br />It is estimated that moisture percentage at saturation is approximately <br />27X for the topsoil and 33Z for the refuse material. These estimates <br />are based on the weight of water present is saturated soil enclosed is <br />4 calibration cells just after the cell is removed from a water bath. <br />.- 20 <br />