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Topsoil Application <br /> • The recommendation for topsoil should be based primarily on need and <br /> cost . <br /> Topsoil is needed on sites having an exposed soil surface low in <br /> organic matter and texture classification of clay loam or heavier. <br /> This need increases significantly if the soils are inherently dry, <br /> if the are slopes greater than 6:1 and if the slope aspect is south <br /> P g P P <br /> or ;outlnrr_st. <br /> fhe total cost of topsoil should include cost of purchase, transpor- <br /> tation, and application. i <br /> Topsoil should be applied after shaping air' grading 1,uvc Le f. '.oln,,leted <br /> and the site tilled to a depth of approximately 6 inches. Tillage <br /> permits topsoil to bind with existing soil. Binding oC s- i1 layet 'E <br /> Inevents air pockets, encourages root penetration , piev.•nts topsoil <br /> slippage on slopes. <br /> Following application of topsoil, final steps in see.ihe,i prepararion i <br /> should he completed. <br /> I <br /> fertilizer Application <br /> A. Critical areas shall be fertilized unless a laboratory soil analysis <br /> indicates sufficient amounts of nitrogen and phosphorous are present : J <br /> • for establishment of vegetation. <br /> h. If fertilizer is recommended , rate of application should not be less <br /> than 40 lbs of nitrogen and 40 lbs of phosphate. <br /> I <br /> Time of application should normally be immediately Prior to seeding. <br /> If proper equipment is used , fertilizer may be applied at time of <br /> seeding . If the nutrient content of the soil is sufficient for <br /> establishment it may be desirable to apply fertilizer after " ' <br /> Y PP Y grass <br /> is well established. This procedure allows the grass, rather than <br /> weeds,. to better utilize the plant nutrients. <br /> I <br /> 5. Mulchinq <br /> — - I <br /> A. All critical areas will be mulched unless the area conservationist, <br /> in consultation with the state agronomist, waives the requirement <br /> in order to accomodate unusual circumstances. <br /> I . For a g6ide in selecting the most effective mulch for controlling <br /> erosion and aiding, in establishing vegetation, see Agronomy Note <br /> No. 47 , "Mulches for Critical Areas", and Standards 6 Specifications <br /> for "Mulchinv,". <br /> Fare _ of 3 <br /> I <br /> Y • I�YiOM-Wt.. A.m Iv i 11 I• •M/f,::Y.:.: <br /> i9� ���li liq'wi u�W11111� <br />