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3t1 45 <br />Figure 1. Average soil water potentials resulting in death of mycorrhizal and non - mycorrhizal <br />sagebrush seedlings. Vertical bars on each column represent 1 standard deviation. <br />Differences between mycorrhizal and non - mycorrhizal treatments were statistically <br />significant at P <0.01 for each age group. (Stahl et al. 1998) <br />80 — <br />60 — <br />40 — <br />20 . - <br />80 — <br />60 — <br />40 — <br />20 — <br />Agc of soc ug when subjected to water SLIM (days) <br />■ <br />• <br />▪ 0 <br />0 <br />00 <br />■ <br />0 <br />■ <br />■ 0 <br />■ 0 <br />60 90 120 150 <br />0 <br />■ 0 <br />_ o <br />0 <br />0 <br />0 <br />90 day old seedlings <br />150 day old seedlings <br />■ MycorrhiZal <br />0 Non- mycorrhizal <br />1 I 1 1 1 f 1 1 <br />-4.0 -3.5 -3.0 -2 5 -2 0 -1.5 -1.0 -0.5 <br />Soil Water Potential (MPa) <br />Figure 2. Survival rates for 90 and 150 day old mycorrhizal and non - mycorrhizal sagebrush <br />seedlings at different levels of soil dryness. (Stahl et al. 1998) <br />