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• '~ 2BEXS vs. 2BCXS. At the 5 cm depth, the temperatures for excelsior (E) and control (C) plats closely approximate each other with the coatrol _ plot more responsive to solar radiation changes. The excelsior treatment temperatures were slightly greater thaw or equal to the coatrol temper- • atures (with two exceptions) until September 16. After this date the control temperatures exceeded those of the excelsior treatment. Maximum temperatures for both plots were recorded on July 26 (excelsior 106°F; coatrol 107°F). E:eelsior treatment temperatures at the 15 ® depth exceeded those of the control by 3°-7°F throughout the sampling period. The E-15 em curve shows a greater response to surface temperature changes than does ~ the control. The E-15 cm curve approxima tes the E-5 ® curve in shape although the peaks cad ridges of the E-15 cm curve are less distinct. M=~i*~*~ temperatures recorded for excelsior (100°F) and control (94°F) occurred on July 26. r 1 i. The temperature curves for these two plots at 25 cm cad 50 cm r closely approximate each other. The E-50 cm temperatures frequently exceeded those of the control by a slight margin. 2BHMS vs. 2BCRS. The control temperature readings are generally warmer than hydromulch treatment readings from July 12 until the end of the sampling period. This situation is particularly noticable through September and October. Prior to this date they generally approximate ~~ each other. The control also seems somewhat more sensitive to solar ~ radiation changes with the hydromulch treatment less affected. The - mazimum temperature for the control occurred on July 26 (107°F). The maximum temperature for the hydromulch treatment vas 104°F on August 23. 4 Curves for the 15 cm, 25 cm, and 50 cm depths are almost identical -~ for the two treatments throughout the sampling season. Temperatures for 27