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•~ 2BERS(E) vs. 2BHMS(H) vs. 2BCX5(C) - Comparison of excelsior, hydromulch, treatments and a control oa 2:1 south-facing slopes 2BESS vs. 2BHMS: Temperatures for the excelsior treatment are warmer than hydromulch treatment temperatures at the 5 ~ depth through- out the year with the exception of readings taken on August 23. The ezcelsior treatment surface warmed up more quickly in early summer and vas slightly more responsive to deviations in solar energy received. This contrasts with results obtained for the two treatments on the vest- facing slope. From September 30 until the final reading there is only a slight difference in surface temperatures betveea treatments. The maximum temperature recorded for the ezcelsior treatment vas 106°F an July 26. The *~~r~Tum temperature for the hydromulch treatment vas 104°F oa August 23. ~~ Substantial differences were noted at the 15 ~.m depth between hydromiich and excelsior plots. Excelsior temperatures are consistantly higher than hydromulch temperatures between May 31 and October 14. Za many cases, the E-15 ® temperatures were within a few degrees of the H-5 cm temperatures and veil above the H-15 cm readings indicating that ezcelsior may retard heat loss better than hydromulch, resulting in higher ~- temperatures at the 15 cm depth. In addition, the E-15 cm temperature curve showed greater sensitivity to surface temperature fluctuations than the H-15 cm curve. Maximum temperatures were recorded oa July 26 for both the excelsior (100°F) and hydromulch (93°F) treatments. Little difference is noted betveea the 25 ® and 50 ® curves for -. each treatment. The *~~~*~+m reading for the excelsior treatment differs by only 2°F from the hydromulch treatment at the 25 cm depth. An .~ abnormally high reading on August 9 for the hydromulcli treatment is the only noticable difference between the curves at the 50 em depth. _ 26