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342-2 Critical Area Pl•ing <br />J <br />Fertilizer requirements <br />1. All critical area plantings shall be fertilized unless field evidence or <br />a laboratory soil analysis indicates sufficient amounts of nitrogen and <br />phosphorus are present for establishment of vegetation. <br />2. The rate of fertilizer application shall be no less than 40 pounds of <br />_ nitrogen (N) and 40 pounds of phos hate (PZ05) per acre. Animal manures <br />or similar organic materia may be used to supply all or part of the <br />specified nutrients. <br />3. Time of application shall be immediately ~r to seeding, ' of <br />seeding, or immediately following seeding, as applicable to the kind of <br />fertilizer and type of equipment used. <br />Seedbed oreparation <br />The seedbed shall be well settled and firm, but friable enoug}i thaC seed can be <br />placed at the seeding depths specified in "llepth of seeding." The seedbed shall <br />be reasonably free of weeds, Competitive stands of weeds that are present before <br />seeding must be controlled by shallow tillage or by application of herbicides <br />labeled for this purpose. <br /> <br />~:~ ~ Soils that have been over-compacted by traffic or equipment, especially when wet, <br />should be tilled to break_ up rooting restrictive layers, and then farrowed, rolled <br />or packed to prepare the required firm seedbed. <br />Plethods of seeding <br />1. --Seed should be p1-anted oiith a drill on all slopes of 33 percent (3:.1) or <br />flatter. The drill must have the capability of }candling the kind an_d rate <br />of seed being planted. <br />2. _ Seed may be broadcast by hand, by mechanical spreader, or by hydraulic <br />equipment on areas that are small, too steep, or not accessible for seed-drill <br />_______ -._ operations: Tkis-speci-f-ication does not provide for hydraulic application of <br />seed and mulch in a single operation. <br />Depth of seeding <br />]. Seed planted with a drill shall be covered with soil to adepth of 1/4 to <br />3/4 inch. <br />2. Seed planted by the hroadcast method shall be incorporated into the surface <br />soil, not [o exceed a" depth of 3/4 inch, by raking, harrowing or other proven <br />method. <br />3. Indian ricegrass may be seeded to a depth of 2 inches on sandy loam and loamy <br />sand soils. <br />1~ <br />Ig~ <br />7. <br />I~. <br />1 <br />USDA/SCS/COLOR:"'• 7/81 TGN 11170 <br />