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342-4 Critical Area Planting <br />Mulching <br />Critical area plantings shall b_e_mulched where rapid establishment of seeded <br />species is essential, or where one or more of the following factors are~ikely <br />,tq cause failure of the planting, as determined by the responsible technician. <br />1. Low or erratic precipitation <br />2. Droughty or slowly permeable soils <br />3. High soil temperatures <br />4. Erosive soils <br />5. Drying-winds-- <br />Where need for mulching has been determined, follow standard and specifications <br />for "Mulching" (484). Cover crops or crop residues produced on the ,site will <br />satisfy mulching_requir_ements..if present in sufficient quantity to provide <br />needed soil protection and moisture conservation. <br />Planting trees, shrubs and vines <br />1. Planting of woody plants must be done in late winter or early spring before <br />bud burst. <br />2. Roots shall be kept.moist at all times before planting. <br />3. Roots should be spread out as close to natural position as possible during <br />planting. <br />4. Holes shall be deep and wide enough to accommodate seedlings without bending <br />roots. <br />5. Stock should be set tiie same depth as in the nursery or slightly deeper. <br />In no case should a plant be set shallower than it was in the nurse <br />6. Soil shall be packed well around roots until seedling cannot be easily pulled <br />from the ground. Care should be taken to eliminate all air pockets in the <br />soil around the roots. <br />7. Plants shall be watered at planting time. <br />Supplemental water for establishment of. plantings <br />1. Seeded plantings. In low rainfall areas, where water is available and where <br />rapid establishment is needed, irrigation of new seeding. should be performed <br />during the first growing season. Water_should be applled,._at.,,approximately <br />1-week intervals, at a rate of 3/4 -- 1 inch per application,, when rainfall <br />is deficient for plant development. <br />2. Woodv plantings. W`ody transplants_sh_ould be watered at time of planting., <br />followed by application of at least 1 gallon ,per plant per weel:,,applied <br />to the soil at the base of the plant during the first growing season. <br />USDA15C5/Colorado-7/81 TGN 11170 <br />