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' will consume large amounts of ,nitrogen which could create a <br /> revegetation weakness or failure. Fertilization will be done at a <br /> i ' rate of 50 pounds of Nitrogen, 50 pounds of Phosphorous; , and 30 <br /> pounds of Potassium per acre . During the mixing process these <br /> fertilizers will be incorporated into the upper portions of the <br /> ' growth medium. <br /> The process of creating a soil will be done either between ) <br /> October and late November or between late March and early May. r.3b <br /> Seeding of the areas treated will occur within 5 days of this <br /> ' treatment . <br /> REVEGETATION: Revegetation of this site will be difficult due to <br /> ' the poor growth medium. However, through the selection o:: species <br /> adapted to gravelly soils the degree of success can be :improved. <br /> Little direction in the revegetation can be taken from the nature <br /> of the surrounding vegetation. The natural grass dominated <br /> ' vegetation developed under different conditions than those found on <br /> this site . This is indicated by the high content of cryptogamic <br /> species (especially lichens) . Although some of the same grass <br /> ' species that occur in the natural vegetation can he used , in the <br /> seeding of this site, the emphasis should be on species that <br /> provide high soil building capability. Therefore, the emphasis <br /> should be on establishing a growth of sufficient density to control <br /> ' erosion and of special biochemical composition that will enhance <br /> the rate of soil development. Matching the surrounding grassland <br /> vegetation to a high degree would probably not be possible unless <br /> ' all of the original soil had been saved. <br /> Therefore, the seed mixture to be used place's great emphasis <br /> on highly productive introduced grasses , deep rooted legumes (soil <br /> builders) , and a small amount of species similar to the surrounding <br /> grass dominated vegetation. The latter are included in hopes that <br /> the vegetation will eventually develop toward something similar to <br /> the surrounding grass dominated vegetation. However , the highly <br /> ' competitive introduced grasses and many of the special varieties of <br /> natives tend to achieve community closure quickly and this often <br /> blocks successional pathways unless total vegetation disruption <br /> occurs after sufficient soil development has occurred. On the <br /> positive side, however, rapid community closure results in quick <br /> erosion control , which on these gravels is of paramount importance. 1 <br /> The following seed mixture will be planted on this site . �tl <br /> ' Seeding rates are based on broadcasting. / This is the preferred <br /> method of seeding this site . Although the seed could be drilled at <br /> half the broadcast rate, drilling is not recommended. Planting ✓ <br /> ' will be done within 5 days of surface treatment as described in the <br /> previous section. However, IN NO CASE will seed be distributed on <br /> top of snow that has fallen since the surface treatment needed to <br /> ' produce the growth medium. <br /> ' 4 <br />