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r • <br />Inventory & Evaluation (con.) November 15, 1978 <br />Items that involve all gravel pit reclamation: <br />1. SHAPING - Ideal shaping after gravel is removed consists of north <br />and east slopes less than four to one (lA°), and south and west slopes <br />less than five to one (12°). Many areas will not permit this type of <br />shaping. A two to one slope is the maximum slope for seeding. Contour <br />grading and terraces not only conserves moisture, but also provides a <br />site for trees and shrubs that may enhance the landscape. Scarification <br />after grading will allow better adherence during top soiling operation. <br />2. MULCH - A soil mulch of straw or hay applied with asphalt to <br />hold it in place is recommended, or as a substitute, a wood fiber <br />(silvifiber) applied with a hydroseeder can be used subsequent to <br />broadcast seeding and soil coverage. Mulching on steep south or west <br />facing slopes is highly recommended. Agronomy blankets have been used <br />in Colorado on steep road cuts and orould be beneficial in this case. <br />3. FERTILIZER - 60 - 80N/acre of both nitrogen and phosphorous <br />are recommended during seeding. <br />4. TOP SOIL - All top soil should be composted. 6-8 inches of <br />topsoil should be distributed over the site after shaping has been done. <br />Specifics for this site Problems: salinity, high water table <br />1. Shaping less than 3/1 <br />2. 6 inch top soil distributed over area <br />3. Fertilize 60-80N of nitrogen and phosphorous at time of seeding <br />4. A firm seedbed should be prepared and seed drilled. <br /> <br /> <br />