. Brigham Young University science bulletin. Biology -- Periodicals. Bricham Young University Science Bulletin. Fig. 3. Standard non-recording rain gauge. struction in areas directly adjacent to our experi- mental plot. In spite of these limitations, irriga- tion times are indicated on the precipitation and soil moisture graphs for each of the three years of the study (Fig. 12, 13, and 14) and hopefully give some indication of the effects produced. Precipitation as rain was measured in a stan- dard non-recording rain gauge (Fig. 3) in hun- dredths of an inch. During the winter, the total snow
. Brigham Young University science bulletin. Biology -- Periodicals. Bricham Young University Science Bulletin. Fig. 3. Standard non-recording rain gauge. struction in areas directly adjacent to our experi- mental plot. In spite of these limitations, irriga- tion times are indicated on the precipitation and soil moisture graphs for each of the three years of the study (Fig. 12, 13, and 14) and hopefully give some indication of the effects produced. Precipitation as rain was measured in a stan- dard non-recording rain gauge (Fig. 3) in hun- dredths of an inch. During the winter, the total snow cover was determined with an ordi- nary ruler by measuring in inches the total depth of snow to the soil surface at several representa- tive sites, and the daily snowfall was likewise determined by measuring the depth to the pre- vious day's crust. Precipitation in the daily snow- fall was calculated as one-tenth that of the measured new snow depth, since that is the average reported snow depth to water equivalent ratio (Mcintosh and Thorn, 1969). During the six months from 1 May through 31 October, soil moisture content from both ir- rigated and non-irrigated plots was determined gravimetrically by taking 6-in (15-cm) core samples each Monday with a 1-in () di- ameter soil auger. The samples were immedi- ately taken to the laboratory, where they were weighed, dried at 105°C for four days, and then reweighed. Relative humidity (RH) was measured in a standard Weather Bureau shelter (Steven- Fig. 4. Hygrothermograph for daily measurement of temperature (top graph) and relative humidity (bottom graph) recorded in a standard weather shelter. son screen) located approximately 5 feet ( m) above ground level with a standard hygrother- mograph which gave a dual record of both temperature and relative humidity on the same curvilinear chart (Fig. 4). The humidity element consisted of multiple strands of specially treated hygroscopic hairs which expanded over the 0- 100 per
Size: 2020px × 1237px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorbrighamyounguniversity, bookcentury1900, bookcollectio
