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u <br />a.Undesirable plant species (including but not limited to reed canary <br />grass, common buckthorn, purple loosestrife, leafy spurge and <br />noxious weeds), or <br />b. Lacking a layer of organic thatch or duff, or <br />c.Topography which tends to channelize the flow of surface runoff, <br />or <br />d. Is characteristically unlikely to retain nutrients and sediment. <br />Buffer areas which have been broken or cultivated within the past ten (10) <br />consecutive years must be restored to a condition consistent with an <br />acceptable buffer area defined in Section 78-1605(b)(l), a restoration or <br />landscape plan must be submitted to the Plamting Director, which <br />restoration shall include, replanting and maintaining according to each of <br />the following guidelines: <br />a.Buffer areas shall be planted with a seed mix containing one <br />hundred (100%) percent perennial native plant species, except for a <br />one-time planting of an amiual nurse or cover crop such as oats or <br />rye. <br />b.The seed mix to be used shall consist of at least twelve (12) pounds <br />pure live seed (PLS) per acre of native prairie grass seed and five <br />(5) pounds PLS per acre of native forbs. Native prairie grass and <br />native forb mixes shall contain no fewer than four (4) and five (5) <br />species respectively. <br />c.The annual nurse or cover crop shall be applied at a rate of twenty <br />(20) pounds per acre. <br />Native shrubs and or trees may be substituted or used in addition to <br />forbs and grasses. Such shrubs may be bare root seedling and shall <br />be planted at a rate of sixty (60) plants per acre. Shrubs shall be <br />distributed so as to provide a natural appearance and shall not be <br />planted in rows. <br />Native prairie grasses and forbs shall be planted by a qualified <br />contractor. <br />f.No fertilizer shall be used in establishing new bufier zones, except <br />on highly dismrbed sites-when deemed necessary to establish <br />acceptable buffer vegetation and then limited to amounts indicated <br />by an accredited soil testing laboratory.