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reclamation • -3- ~uary Z0, 1986 pounds of mulch/acre to the soil surface. At least half of the materials should be 10 inches or more in length. Do not use fine materials. The mulch should be anchored either with commercial netting products (on slopes steeper than 3:1) or mechanically. The latter can be accomplished using a heavy disk implement, with dull blades, to punch the mulch into the soil 2 to 3 inches deep. Crimping should not sever the mulch. Mulching should not be done when wind velocities exceed 15 miles per hour. 9. In addition to the recommended seed mix to be sown, the following tree seedling mixture should be planted: Species Percent of Plant 1<ussian-olive 30 Chinese elm 10 (;ottonless cottonwood 30 C;olden willow 30 The tree spacing should be 20 to 40 feet on center. This is equivalent to 109 to 27 trees per acre, respectively. Plantings should be randomized for an aesthetic appearance. The tree roots of the planting stock must be kept moist while being stored before planting. Planting holes should be deep enough so that the roots are not curled or crowded. The tree seedlings should be planted with the root collar at or not more than 1 inch below the ground level. The soil must be compacted around the roots. Planting should p g year after the frost is out of the ground and ~ be done in the s rin of the if possible before local trees and shrubs have begun to leaf out. Com- petition from grasses and weeds should be controlled within a 3' diameter around each tree, This can be accomplished by covering the tree and spray- ing the surrounding weeds with a contact herbicide, or by installing plastic sheeting around each tree. Trees which do not survive the first year should be replaced the following year. Plantings should be protected from rodents, rabbits, and deer. Means of animal control may include either chemical repellants or mechanical devices such as fences, screens, traps, etc. 10. Supplemental water should be provided during the first two growing seasons if it can be made available. Supplemental irrigation will make a signifi- cant difference in tree and grass establishment success. water should be applied a[ one week intervals at a rate of 3/4 to 1 inch per application. During the second growing season, enough supplemental water should be applied so that when combined with natural precipitation, 2 inches of moisture is received per month during Plarch, April, May or June. After June, supplemental irrigations can be eliminated. 11. All tillage, seeding and crimping operations should be performad across the slope when practical.