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UNITED STATES DEPARTMENT OF AGRICULTURE <br />Soil Cuns a rva[Lon Sc rv ice <br />Colorado <br />Technical Cu lde <br />S ec[lan 1V <br />All Field Elf Eices <br />July 1981 <br />STANDARDS AND SPECI Fi CATIONS <br />CRITIGL AREA PIANTENG (x.) <br />(742) <br />Stands rd <br />De(Inl[inn <br />Plant log vegetation, ouch as trees, <br />shrubs, vfnes, graasea or for bs, <br />on hlgbly e[udlble or crlt Leal ly <br />erod Lng areas (does not Include tree <br />plantln6 mainly for voW products}. <br />Pur +~nsc <br />Plannln F, cents idc rot loos <br />Oxher come rva tlon prat Glees, Inc luJ log <br />but not Ilm lied to divcrsluns, land <br />smoo tliing, obstruction removal, su r(ace <br />and subsurface drains, and unJ ergroumd <br />outlets, a.ry be necessa[y co prepare a <br />cr ltlml arm for planting. Site prc- <br />paratlun attompilshcd through [be apPLi- <br />m[lon of the above practices should <br />resu It In a ei LC me eLing [he fullovLng <br />standards. <br />To stabtllze the so1L, reJ ucc Ja mage <br />from sediment and runoff m down stream <br />areas, and lmprovc wild Lifc liabita[ <br />and visual resources. <br />Condf[lons where practice appl Les <br />On highly erodible or crAt Leal Ly ero- <br />dible or crlt ica lly eroJ ing areas. <br />These areas usually cannot be stabll- <br />lzed by ordlna ry conservallpn Creat- <br />ment and management and, If left <br />unCrca[eJ, can muse Sev Cie a[o sion <br />or seJlmcnt damage. Examples of <br />applicable areas are dams, dikes, <br />mine spoil, levees, roadsides, cuts, <br />f Ills, surface-m Lned arms, and de- <br />nuded or Faille) areas vbere veRcta- <br />[ion is dit[lc alt co establish by <br />usual planting me [h od s. <br />Crf ltcal area pia n[Lng should be <br />a pplled only on sites [hat have [he <br />capability of suppor[ing vegetation. <br />Some crl[iml areas are eo host[ le co <br />plan[ growth, because of <Ilm~tc, <br />so tls or slope, [bat smbillzation <br />can be achieved only tbrough struc- <br />tural mm sores. <br />TGN 7%170 <br />1. Land slopes shoal) oat exceed 50 <br />pereenl (2:L) and shoo lJ be [latter <br />vbere fcaslble and prat [Icable. <br />1. Sails or so LL mater tats must have <br />sufflc l<nt depth and potential <br />f Crtlli[y [o support the type of <br />vegetation [u be established. <br />1. Nnt er fats such as rocks and [rash <br />Ibat vlll Interfere vt th plant tog <br />must be remove). <br />4. Runoff va to from the sl to or ad]a- <br />cen[ areas must be controlled In a <br />manner that will prevent serious <br />c[os/on auJ damage [o the Planting. <br />SpeclCicnt Ions <br />TopsoiltnR <br />In [he event [hat the so lls have lnsufff- <br />cient depth or have phys Leal character- <br />istics unsn [table Cor development of <br />vcgetat iVe over, topso it or 5011 ma CCrlal <br />having the wyob lll[y of supporLing [he <br />planned vegcmtive VLm tine, shall be <br />brougLt Ln anJ spread over [he deflc lout <br />arc as. Tbt ma u•r lal must be appllcd <br />u nfformly in su[l is tent Jcp [h to support <br />the type anJ quality of vegetative cover <br />planned fur [bc site. Sa urcc o[ mat cr La is <br />must be apt raved by the responsible <br />tee hole fan. <br />342-1 Ccit Leal A[ea Planting <br />Fe r[Slizer requ lrments <br />L All~crit Leal area plav[ings shall be Eert lllxed unless field ev ld ones or <br />a la bo ra COry soil analysis indicates su[f Lctent amounts of nlcrogen end <br />phosphorus are prcaent for es[abllshment of vege[a tlon. <br />2. The rate of fer[11 Lser appllca[lan shall be no less than 40 pounds o[ • <br />nlcrogen (N) and 40 pounds of phosl+ha to (P205) per acre. Animal manures <br />or s1m11 ar organfc ma terlal may be used to supply all or part of the <br />spec if ted nutrlen[s. <br />3, ilme of apyl lea [Ion shall be 1mmeJ late ly yrlur to swJing, at tho t4ae o[ <br />seeding, or immed lately fol laving sceJ Tug, as applicable to the k[nd o[ <br />fe et tl izcr and type of equ lpment usuJ. <br />Seedbed pt spa ration <br />the seedbed shall be well settle) and firm, but friable em mgh [bat seed can br. <br />placed ac Che seed Sng dap tbs spec if Lett In "OCpth o[ seeding." The seedbed shall <br />be reasonably free of weeds. Compca hive stands of ve¢ds that a c present bet ore <br />eeJ Lng must be controlled by shallow tillage or by appllcatiun oL Ire rhlc ld es <br />labeled for [his purpose. <br />Soils that have been over-compac[Cd by Graf Clc or equ lpme nt, especially vh en vet, <br />should be Cf lied to break up tooting res[r ictiv¢ layers, and then harrowed, rolled <br />or packed Co prepare the required firm se¢d bed. <br />Methods of seed Sng <br />L. Seed should be planted vlth a Jrtll on all slopes of 7J pcrcc nt (J: U ar <br />flatter. The drill must Lave the capability of Fandling [he kind and ra tc <br />of seed being planted. <br />2. Seed may be broadcast by hand, by medmnteal spreader, or by hydrau]Ic <br />equipment on areas [bat are small, too steep, or not accessible fur seed-drill <br />opec at tons. This speti[lwtion Joes not prow lde for hyd raullc appllcatlun of <br />seed atM mu lcb in a single opera[ Lon. <br />Dep [h of sceding <br />1. Seed plav[ed vl[h a drill eha 11 be covered vlth loll [o adepth of 1/4 to <br />3/4 Inch. <br />2. Seed planted by the broadcast method shall be ivcorpe rated ln[o [he surface <br />soli, nut to exceed a depth of 7j4 inch, by raking, ha rrwing or other proven <br />method. <br />7. Indian rlcegrass may be seeded to .~ depth v( 2 Inches on sandy loam and loamy <br />sand soils. <br />USDA/SCS/COLORADO 7/AI tGN 7170 <br />