Campbell Scientific Equipment (Campbell Scientific, Inc. Logan, UT) is being used for our study. For the first year of our study 3 CR-10 units were placed in the field. Two leaf wetness sensors (model #237) and two air temperature sensors (107B) were used to calculate DSV's (disease severity values) for Tom-Cast. DSV data was downloaded daily using a portable laptop computer (IBM PS/2note N51sx) equipped with CSI software (PC208E) using an RS232 interface cable (SC929). A tipping bucket rain gauge (TE525) was used to measure rainfall. Soil moisture probes (CS615) and soil temperature probes (107B) were used to monitor soil moisture and temperature differences between mulched and unmulched treatments. In 1998, relative humidity (CS500) and wind speed & direction (03001) will be monitored. The picture of the CR-10 unit in the field was taken around fruit set. The tomato beds in the background are chemically killed mulched plots. Note the uniformity of the mulch
