Figure 4. Relationships between predawn leaf water potentials of two perennial grasses (Kentucky bluegrass and western wheatgrass) and soil moisture content in range sites of different grazing levels. For each data point, the horizontal coordinate is the measured water content at a particular access tube on a particular date, and the vertical is the average of leaf water potentials (n=3) measured in the vicinity of the access tube. Linear relationships for specific grazing intensity are shown only when they are statistically significant. (A). Kentucky bluegrass as plotted against soil water content at 0-6 in. depth. (B). Kentucky bluegrass plotted against soil moisture at 6-12 in. depth. (C). Western wheatgrass plotted against soil moisture at 0-6 in. depth.