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43 <br />C~ <br />Es[abllalled Series <br />Rev. AJC/CJF <br />5/77 <br />PERSAYO SERIES <br />The Pe rs ayo se rl es is a member of [he loamy, mixed (calcareous), mesicr sha llow family of Tyl+(c <br />Turrlu r[Leu ts. Pe rsayo soils ore calcareous througLo ue and [yptcally have thin, allghtly Ja rkuneJ <br />AI Lu rizuns mW nu+Ju•ra[uly floc [e xtun•J [: hurtzon. over soft shale or silt sC nn¢ ~[ u Jcp[h n( <br />14 inches. <br />T~pl piny PeJun: Pc rsayo silty clay loam - grasslanJ <br />(Colors are Cur Jry soil unless o[herv lse noted.) <br />AI 0-4"--Light yellowish h[uwn (2.SY 6/3) 11 gh[ silty clay loam, IigLC olive brawn (2.SY S/1) <br />ivoist; moderate Clne granular structure, weak platy In [Le upper 1/2 Inch; soft, very <br />frlaL le; calcareous; mule ra Ce ly alkaline (pH R.2); grnd ual smooth bounJary. O [0 7 <br />Inches [hick) <br />CI 4-14"--Light yet luulsh brown (2.SY 6/4) light silty clay loam, light olive brown (2.SY S/4) ' <br />mu is t; weak muJlum sub an gu tar blocky structure that parts m mule rate floe gra nulus; <br />ha rJ, very Frl uL le; fuw small calcium sulfate tryst all; calca reuus; muJc ra[ely alkallnu <br />(VU g•'--): gra Jual smooth boundary. (7 to 14 Inches till ck) <br />C2 14"--Calcareous, gray and yellow shales and sl lts[ones. <br />~~_Lucatlml: flontrose Co un[y, Co lu raJu; 0.1 mile north o[ [he SE corner of sec. 22, 'f.SIN., <br />N.IOW. <br />Nunge In Cho ratle rls[ics: Uep[h [a the unde rlying pa ra ll[hlc contact ranges from 10 to LO In: Les. <br />Organic ca rb un Sn [Ile surface IS Inches or In tLe soil above the bcdrn ck is app ruxluw[cly <br />.4 percent. The sanJ/clay ratio ranges from less Chan 1 [o about S. Ex[.hanguable soJ ium ' <br />is typlc ally less than 7 pu tern[, 6u[ [ends to Increase as Jep[h lnc rua ses unJ JifFe rs unsung <br />peJous. Calcium carbon atu uqulvalmt ranges from about S [0 14 percent anJ calcium <br />sul[uce ranges from less Chan 1 [u about 10 pe teen [. The series control section is typically <br />heavy silt loam or light silty clay loam, but clay ranges from 18 [o JS pu rcen[, silt (rum JO <br />• to 65 percent and sanJ from S [0 45 pe rcen [. Coarse fragments are usually lass than 5 percuu[ <br />anJ range Irom U [u IS pe rcen[. Mean annual soil tumpe rotate ranges from 47° [u Stl°F. fie an sunimur <br />soli [empe rat~ro ranges from 60° ro 16°f. 'fh ese auils are Jry lu all pa r[s u[ the niolsn~re control <br />suction for mu re [hdn 7/4 of [he [line Chu[ tLe ao L1 tenipe ra[um is above 4l°f. 'fhc A Iwrizon <br />has hoc u[ IUYN through SY, value of 5 through 7 Jry ur 4 ur 5 mula[, anJ ch nmw of 2 through <br />4. It is moJc rarely or steun gly alkaline (pll R.I1 to 9.0) anJ Is soft [u slightly hart. The C <br />horizon Las hoc of 1DYN through 51'. I[ is muJu ra to ly or strongly ulkalLs (pll R.0 [u 9.U), li <br />cuntaiua some vislh lu calcium Garbuw [u wW calcium sulCa[e whldi are nut cuncunt ra tcJ Inlu a <br />Je[Inl[e Imrizon of seconJa ry accumulntimi anJ a n consiJe reJ [u be cLa ratio n sties of Chu parmu <br />acJlnimlis ratLur than peJug mic. <br />Cu mpeting tic rl.~s anJ Chu lr ^Iffe rcn[lae: Those are the tllrJsley, Oceanet, and Shalt surlcs. <br />tllrJsley soils have mu re than IS pe rcen[ exchangeable soJ Lim. Oceanu[ lolls have less than 18 <br />pe rcunl clay and mu ru than 52 pe rcmu sanJ In [he series control section. Shale[ sails Lu va hue nl <br />SY4 or redJer. <br />Setting: 'I'huse soils are on muJu ra rely to steeply sloping upland hills auJ riJges. Slope graJiencs <br />range from ? to aG uu[ 45 pe rcun[. TLe soils fo rmeJ Sn [hIn sediments wea[hereJ from unde rlying <br />soft sc Jimenta ry beJruck. A[ Chu type location average annual preciplca[lon is 8 inches wllh <br />peak pe riuJs of prucipltaclun uccu wing Juring thu spring and early summer, Mean annual <br />tempera n~rc is S7' F. anJ mean summer temperature is 70'F. <br />Principal Assocl aced Soils: These are [he Ch ipe[a and Menoken sods. Chlpeta soils have more <br />than 75 percent clay In [he se rlus control sec[Son. Menoken lolls lack bedrock above a Jeoth of <br />20 inches anJ have Iambic horizons. <br />Ura lnrge and Pe rme abll f[y: Well-J ra toed; medium [o rap ld runoff; moderately slow permeabi ll[y. <br />Use and Ve getatluu: Used almost exclusively for native pas CUre land. Natlvu vc gecat tun !s sal[ <br />sage, graasuuooJ, shadsca le, and sca[[e red grasses. <br />DSs[rlb orlon and Exten r Western Colorado and Wyoming, nor[hwe stern New Hexlc o, and eastern lit ah. <br />l+e series is o large extent. <br />. Se rtes Established: Western Colorado Re connaissante, W9S, 19]9. <br />National Coope ra[lve Soll Survey <br />U. S. A. <br />