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13 <br /> <br /> <br />• <br />60 <br />~ 55 <br />0 <br />U <br />a 50 <br />a <br />0 <br />c <br />~j 45 <br />w <br />c <br />a~ <br />40 <br />a~ <br />n. <br />35 <br />30 <br />15 30 45 60 <br />Topsoil Depth (cm} <br />Figure 3. Mean canopy cover of perennial grasses, forbs, and shrubs <br />on four soil depths, ten years after seeding. Different <br />letters represent significant differences across topsoil <br />depths (p<_0.05). <br />