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26 <br />x Necessary and sufficient erosion control to ensure even distribution and prevent wash-out of seed. f.) <br />x Category 3N-straw (as defined by Minnesota Department of Transportation) natural net erosion control blanket should be installed on <br />slopes greater than 3:1 rise to run. <br />Cover crop <br />x Bare soil areas or areas where erosion control measures have been taken will receive a cover-crop of cultivated oats or winter wheat. <br />x Contractor is responsible for purchasing, delivering, and seeding the cover-crop. <br />Planting trees and shrubs <br />x Separate species to be sweated in bundles of 5-10, depending on size. Bundles should not contain more than one species. <br />x Bare root plants should be stored in dry conditions between 45-70 degrees F or outside on bare ground if temperatures are suitable. <br />x Avoid exposing bundles to the sun to prevent damage. <br />x Syringe the roots thoroughly (spray with a hose or dip into tank) and then cover them with materials that will hold moisture, such as <br />wet straw, wet burlap, wet excelsior. Do not cover the stems and branches with these materials. <br />x Cover roots, stems and branches with clear or opaque plastic and anchor down the edges to keep the interior warm and humid. <br />x Take precautions against drying out roots and otherwise retain the integrity of bare root trees. <br />x Planting should occur once bud swell begins. <br />Establishment maintenance <br />x Mowing: <br />x Mow all seeded areas 2-3 times in the first-year post seeding. <br />x At least one mowing in the following year. <br />x Mowing occurrences will be triggered by notification from the Project Manager. <br />x Mowing will occur when weeds are 12-18 inches tall, and before the seed is viable. <br />x Mow to a height of 4-6 inches. <br />x Significantly disturbed soil and damage to restored areas are to be repaired by the Contractor. <br />Herbaceous <br />invasive control <br />Cool Season Grasses: April-June (Spring) or September –October (early fall) with (choose herbicide: clethodim, sethoxydim, or glyphosate) <br />Warm Season Grasses: June – September with (choose herbicide: clethodim, sethoxydim, or glyphosate) <br />x Herbicide Application: <br />o 90% removal of the targeted specieswill occur by mechanical or chemical methods. <br />o Additional herbaceous invasives spotted by the provider should be brought to the project manager’s attention. <br />o This project is not concerned with the following invasive herbaceous species and are beyond its scope: <br />o Clopyralid formulations (e.g. Transline) are preferred for application to forbs to limit herbicide residence time in soil. <br />o Treatment should be conducted in summer to early fall. <br />o Spray operators should take care to spray all leaf surfaces of targeted species and avoid spraying on the top layer of leaves. <br />o No foliar herbicide applications (regardless of formulation) shall be performed when the daily temperature is predicted to be <br />>85 degrees F with a corresponding relative humidity of <45% at any time during the day (not just at the time of application).