2007-01-22_REVISION - M1987097 - Laserfiche WebLink

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2 - 342 Additional Criteria to Restore Degraded Sites If gullies or deep rills are present, they will be treated, if feasible, to allow equipment operation and ensure proper site and seedbed preparation. Apply soil amendments as necessary to ameliorate or eliminate physical or chemical conditions that inhibit plant establishment and growth. Required amendments such as compost or manure, agricultural limestone or elemental sulfur shall be included in the site specification with amounts, timing, and method of application. CONSIDERATIONS Native species or mixes that are adapted to the site and have multiple values should be considered. Avoid species that may harbor pests. Species diversity should be considered to avoid loss of function due to species-specific pests. Other conservation practices such as Diversions, Land Smoothing, Obsfruction Removal, Surface and Sub-Surface Drains and Underground Outlets may be necessary to prepare a critical area for planting. PLANS AND SPECIFICATIONS Prepare plans and specifications for establishment and operation of this practice for each field or treatment unit according to the Criteria, Considerations and Operation and Maintenance sections of this standard. Specfications shall describe the requirements for applying this practice to meet the intended purpose. Record practice specfigtions using approved specification sheets, jab sheets, narrative statements in the conservation plan, or other acceptable documentation. The following elements shall be addressed in the plan, as applipble, to meet the intended purpose. Site Preparation Remove materials such as rocks and trash that will interfere with planting. Control runoff water from the site or adjacent areas to prevent serious erosion and damage to the planting. Topsoil If soils in the critical area have insufficient depth or physipl characteristics unsuitable for development of vegetative cover, spread topsoil or soil material having the capability of supporting the planned vegetation over the deficient areas. Apply the material uniformly and in sufficient depth to support the type and quality of vegetative cover for the site. Sources of soil materials must be approved before installation, Fertilizer Application Base fertilizer and or amendment applications on soil test recommendations and the Colorado Nutrient Management, 590 Conservation Practice Standard. If phosphorus is required, apply and incorporate before seeding. Delay nitrogen applications until stand is established. Fertilizer applications made without a soil test recommendation may cause excess weed growth that will inhibit stand establishment. Seedbed Preparation The seedbed shall 6e well settled and firm, but friable enough that seed can be placed at the seeding depths specified in "Depth of Seeding'. Soils that have been over-compacted by traffic or equipment, especially when wet, should be tilled to breakup root resfricting layers, then harrowed, rolled or packed to prepare the required firm seedbed. The seedbed shall be reasonably free of weeds. Competitive stands of weeds that are present before seeding must be controlled by shallow tillage or by application of herbicides labeled for this purpose. If noxious weeds are present, plan and apply the Pest Management, 595 Conservation Practice Standard. Methods of seeding Use a drill to plant seed on slopes that are 33 percent (3;1) or flatter. The drill must have the capability of handling the kind and application rate of seed. Incorporate seed to a depth not to exceed'/. inch by raking, harrowing or other proven method 'rf seed will 6e broadcast applied rather than drilled. Indian ricegrass may be planted to a depth of 2 inches on sandy loam and loamy sand soils. NRCS,CO OctoberZ004