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6 <br />test will be decompacted with chisel plows, rippers, or tillers depending on severity of compaction. <br />Decompaction may be followed by disking to prepare a smooth, evenly textured soil surface. <br />If existing undesirable vegetation is present following grading and decompaction, preparatory herbicide <br />treatment should be conducted as needed. This spraying should be done at least 14-21 days prior to <br />scheduled seeding with the application of a non-specific herbicide to all undesirable live vegetation in <br />the seeding area. A second herbicide treatment may be applied to any significant areas of undesirable <br />vegetation still growing 14 days after the first herbicide application. Herbicide drift would be minimized <br />by utilizing appropriate equipment calibrated to be conducive to the weather conditions at the time of <br />treatment. <br />6.2 Seeding and Planting <br />Seed should be installed using a Truax no-till drill or Trillion type seeder (or similar seeder designed for <br />native species). Where drill-seeding is not practical due to Site conditions or management unit size, <br />seed should be broadcast onto the soil surface using a Vicon seeder (or similar) and raked to ensure <br />good seed-to-soil contact. <br />Prior to seed installation, the seeding contractor will calibrate and adjust seeding equipment to sow <br />seeds at the proper seeding rate. Equipment will be operated in a manner to ensure complete coverage <br />of the entire area to be seeded. Equipment will be steam cleaned or thoroughly washed prior to starting <br />work to prevent contamination from outside seed sources. <br />6.2.1 Seed Mixes <br />Three seed mix types are planned for the Project, corresponding with each management unit. <br />•Upland Prairie: MNL Upland Dry Prairie Mix – Shortgrass (Appendix A) <br />o This seed mix is appropriate for a wide range of soil types and includes species that will <br />tend to grow about 2 to 4 feet tall. <br />o Similar state seed mixes: <br />BWSR Little Bluestem Urban Prairie 35-121 <br />BWSR Pollinator Plot Urban SE 38-631 seed mix <br />•Basin/Wetland: MNL Stormwater Basin Mix (Appendix A) <br />o This seed mix is appropriate for wetter soils and includes plant species that may grow 3 <br />to 6 feet tall. <br />o Similar state seed mixes: <br />BWSR Stormwater South and West 33-261 <br />Wet Meadow South and West 34-272 <br />•Wildflower Drifts: Three specialty drift mixes to be overseeded in select upland prairie areas <br />(Table 2). These drift areas may be overseeded, or planted with forbs, with some combination of <br />the listed species in Table 2. <br />A cover crop should be installed into any open soils left undisturbed for more than 14 days without <br />erosion control or permanent seeding to provide soil stabilization. <br />Trees and shrubs may be installed throughout the site as a part of revegetation activities. MNL <br />recommends the use of native-origin tree species appropriate for the site and expected conditions. This <br />would include species like bur oak (Quercus macrocarpa), white oak (Quercus alba), northern pin oak <br />(Quercus ellipsoidales), quaking aspen (Populus tremuloides), black cherry (Prunus serotina), paper