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Ti�,c secdbcd should be firtn and rough All so�i should bc roughrncd <br />nu matter whnt the slope. If coinpaction is required (or engineering <br />purposes, slo� �s must be tnck ��alkrd before seeding. Backblading or <br />smoothing of slopes greaier than 4:1 is not alln�ced if Ihey are to be <br />sccdcd. <br />• Nc�e and morc cfTcetivc restoration-bascd landscape pra:ticcs rcly on <br />dccper incorpor.uion Ihan Ihat provided by a simplc singlo-p�ss <br />rotatilling trcatmcnt. 1Vhcrcvcr pnctical thc subgradc should be <br />initially ripped to improve long-terni pernicabiliry, infiltr.uion, and <br />water in(low yualitics. At a niininmm, penn.incnt arcas shall usc soil <br />amcndments to achic��c organic maucr and pcnncability perforntancc <br />defined in engineered soil/IAndscape systems. For systems tha� are <br />decper than S inchcs ihc rototilling proccss should bc donc in multiplc <br />Iifis, or the prepared suil syslem shall bc prepared prope;ly and then <br />placed to achicce the specificd depth. <br />• Organic maucr is thc most appropriatc forn� of..fcrtilizcr" bccausc it <br />pmvides nutricnts (includinc nitrogcn, phosphonis, and potassium) in <br />thc Icas1 watcr-solublc fomi. A natural systcm typically rcleascs 2-10 <br />perccnt of its nutricnts annually. Chemical fertilizers ha� e since been <br />fonnulatcd to simulatc what organic mancr does natunlly. <br />• In general, 10-4-6 N-P-K (nitrogcn-phospliorus-poiassium) fertilizer <br />can be u�cd at a relC OP�O rOUtlljS (1Cf �C(C. SI0�5'-fCIC15C (Cfl1I1LCf5 <br />should ah�:iys hc used because they arr morc e(licient and haee fe�cer <br />em•ironmcmal impacts. It is recommended that arr.is being seeded for <br />final landscaping conduct soil tests to detennine the exact type and <br />quantity of fertilizer nceded. This will prc�cnt the o��er-applicatirni of <br />fertilitec Fertilizer should not be added to the hvdromulch machine <br />and agitatcd more �han ZO minutcs bcforc it is to bc uscd. If aeitatcd <br />�ou much, thc slmv-rcic.isc coating is desiroycd. <br />• l'hcre arc mm�crous pruducts a�ailaMc on thc markct th:u takc thc <br />pLicr of chrmical tcrtilizcrs. Thc,c includc scvcral wi�h sc:����ccd <br />cxira�is that arc bcncficial lo soil microbcs :md organisms. If 100 <br />perccnt rnuonsccd ntcal is uscJ as �hc ntulch in hydrosecd, chcmical <br />(crtili..:r ntay not hc ncccss;�ry�. Cottonsced mcal is a good sourcc of <br />long-tcnn, slow-rcicnsc. a��ailahlc nitrogcn <br />. Ifydrusced apphcations sh:ill includc a minimum of I.50(I poimds per <br />acrc of mulch w�ith 3 perccnt tackificr. Muldi may bc madc up of 100 <br />perccnt: cnttonsced mcal; fibcrs maAc of wood, rccycicd ccllulosc, <br />hcmp, and kcnaf: compost; or blcnds of thcse. "I'ackificr shall hc pl.uu- <br />based, such as guar or alpha plantago, or chemical-hased such as <br />polyacrylamide or pulymers. Any mulch or tackitier product used <br />shall bc installcd per manuCacturcr's insinictions Gcncr;dly, mulchcs <br />comc in 40-i0 pound bags. Sccd and fertilizer are added :u time of <br />appl ication. <br />4-14 Volame 11— ConsWcfion Stormwater Pollu�ion Pievention Fe6�uary 2005 <br />