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<br />70
<br />SOIL SURVEY
<br />Colorado. 'I'hrse. data arr. rrprese))tative of most of
<br />t\dauls County.
<br />'Chc average, nunual temperature is near b0° at an
<br />elevation of 6,2ot1 fret, but this c•an be expected t.o v:u'y
<br />a fclc degrees from the Io1Trr rlrvat.ious nl. the casGsu
<br />end of the cnuuty to t.hc higher rlcva.timis nt the 11'csteru
<br />end. 'Chr. o•lde acr.ragr. range in daily lemprrature o[
<br />~G^ to ~5° and n Icicle nl'm'agc range in annual tempcra-
<br />turc arc typical of the IIigh Plains.:\s n rrsulL of « file
<br />variations from d;ty to cloy or over n period aF n fcAc
<br />days, cxl.rculcly hat rccather in sununrr or extrrmcly
<br />cold )venther in Irinl.rr is~encrnlly of short Qnrnl.iml and
<br />is follolcctl hy' n1m'c n)odcrntr tcnllrcratnrc.
<br />1'hc avm•a;;c annual grnn'ing srnsrn] in Adams Count.}'
<br />is abort l,~u days. 'f'able 10 gives the probability at
<br />Rycrs, Arapahoe County, of the Inst freezing tcmpcra-
<br />tures in spring and the lirst brezing temperatures in
<br />fal I.
<br />])ata for long periods indicntr. that the. nvcrn~c annnnl
<br />~nrcipitatiou in the crnmty ranks from 12.fr to L65
<br />inches. Tt feuds In ha higher in t.hc ~ccstrrn part.. Vm'ia-
<br />timis within the county arc rrlatcll to tIIC IOCIII tCl'I'alll,
<br />elevation, and slopes Particularly in spring nail snmmrr,
<br />t.hc. rxh•culr. enriabilit.c in the mnnunt n{ prcripitat.irn]
<br />from vr:u• to crnr and bctlvccu lornlitics in the same v1 :2r
<br />is sn l;u•go t.hnt. even 1011g•11P.1'm(I :1 \'CI'nr^,CS nl'e .LITCCIrII I))'
<br />Clnlllr6 Oer_II1'1'(`f Il'l`s alld al'C llOt. ca51I\' IIItC I'pl'l`tl•ll III
<br />terms of arl.nnl clinllllic dilTcrcnres. 1.'rnbable ;ulnnal
<br />prrcipikntion (lid. T`>) is part.irulnrly simlilirant in shou•-
<br />ulg the rxpcrh`d variation of rninfnll [rain }'car to crnr.
<br />\lnc~n annnnl precipitation for 2 cr;u's in a I'o1C Is Irss
<br />than about l l iurhrs, most dl;}•lnnd reaps fail. '1'a'n m'
<br />more dry yr:u•s in n role generally rlo ant. orrnr mm•c
<br />than once cccr}• 10 ernes. P'igures ou the normal nvrrn;,n`.
<br />temperature and precipitation by In Ollths nIl(1 }'rnl', a1011rrr
<br />11'it.ll days of snnly cover. me givcu in table 0.
<br />Total precipitnl.iml and snon•fall in ncintrr me higher
<br />in t•hc Icrstcrn p:nt. of t,hr, rount.y than in the rnstcrn
<br />part. Differcucrs :u•c smnctinlcs small hut. cmisistcul. frmn
<br />Ocl.obcr intro \Tny. 'Chr. average annual snolrfnll is about.
<br />G9 innc~s at I)rnvcr nail is ahmtt. 4G inches nt Rccrs. Tn
<br />Clllll lllrl', hnll'el'r l', I)1'l`rll)Itat.l Oll gcnm•n lly :u'rrn~os smnc-
<br />nchat higher' in Lhr eastern part of t.hr cmud.y lulh is
<br />highly cnriablc {1'11111 \'ra l' t0 VC6\' nt. dltl'C 1'Mlt IOr Diltll`S,
<br />The accragr rrlntice humidity is ~!1 percent thrmll_6
<br />the clay nail 6? prrcrut dltriug the night. It is sli~rhl.ly
<br />higher in Ivintr,r Lhnn in smm~mr. On the avcra~r, the
<br />sun shiucs GD percent of the possible, boars of suulighl
<br />RI11111aIIy.
<br />TT.M1IISt01'In5 that urc damngiug to rrops occur in some
<br />parts of the, county almost rccrl' vr:n'. 'I'hrrr is au cx~
<br />tended pattern to the hnilsloruls. •'I'hc`}' ;;rncrally ucenr
<br />brtlcecu \Iny l:i mld September I, mld Lhey arr. mosl
<br />libel}' to occur in .lone nod .Inly.'1'hc hail geucrallY Gills
<br />in strips less th:m l mile )cidc nail f Illdl`s 1nllh. Ilall l9
<br />more rununon in the eastern part of the county than in
<br />the n'rslm•n part.
<br />Literature Cited
<br />(I) ,\4Fn ICAN ,\Sfi0C1ATI0N OF STATF. H141111'AT (11+F1r,1ALS.
<br />I!IGI. 6TA NnAltO SI'F.CIFICAI'10 NN PIIII 111411 \vAl' \IAl'1.IIIALA
<br />ANn )na'11005 OV SAAt'LINII AN O'1'P:SI'I SO. 1'nl. k, 2 r.,
<br />illns, 1Vnshiugton, D.C.
<br />(_) I{.\L0\rl ~, 11.Vt6. I\I:I,LUfn, (•II,VU.I:F I:, :11111 •I•IIP11I'. .IAn11:Y.
<br />1!L1S. sort, c1..ASSIFICATION. U.S. Uepl. .I~r. \'LL,: ain-
<br />1001, illus.
<br />]!Ile!. 5011. CLASAIFICATION IN TIIC UNITP:n STATnS. Cfl. 1:17;
<br />I a•! i-I nau.
<br />(~I) 'l'unar, .Tn>I rs null Rnurn, C7UT U.
<br />J!119. Ills ll lfit C.\TFCOIlIf9 Of FOIL C'LASFIFII'A'rION: nIl01:11,
<br />SUIIOIIIIIat, ANO OIIGAT 5011. nllOUrn. Sail SCI. al;
<br />111-1•!li.
<br />(G) UNrn:u $rArr:s 1)I:rnnr nl r•.nr of 1141114U LTUlIr:.
<br />7!1:11, sin r. cum'er nlANUnI.. AI; r. Iles nllhnnlc 1S, .a1, pp.,
<br />illus. ISnpplrulrnf. issnrvl iu 11ag Iaf!I
<br />IG)
<br />I!IIiO. SOIL CLASSIFICATION, A Ca)I I'IIF^I:NFII'I: S)'STC)I, fell
<br />nrrnoz nl Arron. ^G:. pp., illus. l$npplrnu'nls ixsnnl
<br />in ~lurrh IaGZ nau Septend+rr 1twtiJ
<br />(Z) IlNrrl~:n R•r,rrrs 1)r:rnn'rnlu:N•r m• UrsF1':rvs1:.
<br />J :IIi`;. UNIN'll~:ll SUII, f.1.ASSI FICATION SYS'1'1:\I 1'Olt IIOAl15. AI11~
<br />I+1n L115, 4: n10A NRAl1:NT6, ANO POUNPATIONF. ]Illr
<br />STD-cIGR. ao nn., funs.
<br />Glossary
<br />AgRregnlr, soil. \Innc arc narficlrs hclrl iu n si nFlc umss nr rluslrr.
<br />Nnf m:11 .evil ng;; rrFa tes such :IS crumbs, Llncls, m• prlsnls, me
<br />called prlls. Clod.9 nn' nFgre~a lrS prollnrrJ by tills FC nr Iogr.hlY.
<br />Alkali soil. (:rnrcTlU'. n Idghlp nll:nlinc snit CpccilirnllT, ml niknll
<br />soil bas so h[g0. a degda` nl' niknlinflp (1111 ti5 nr h}ghrr)
<br />m' n. high a prrrruln~c of rsrlm n~raldc smlium U prrvrul ..r
<br />wm'r n[ the fnlal eschn n~a blr bn srs), nr 6n1 h, Ihal Ihr Fnnclh
<br />nC uu~sl crop plank is loo' Crmn this cause.
<br />'I'A 711J•; Ill.-ProGaGlr, rl¢!rs n( hr.rl Jrrrziuq Inmylcrrrlnrr.c in. syn'in.g n.n rl fr rs7 i.n. Jdll
<br />1Rascd a1 Sato from 6ycrs, Arapnlwc Conntyl
<br />l IaU`s (nr a Ficrn prnbabili lp' nl. a tcugmr;d nrr nf-
<br />•
<br />Probnbililp
<br />~In'i nl~:
<br />I crnr in Ill lnlrr lh:m____ ___ ___ ____ ___
<br />^crarx iu In lalrr lh:m__ ______________ _____
<br />C. years iu 111 hUrr lhttu____________________ ___
<br />rnu:
<br />I rear in la r;l rlirr Lhau_. ___ _ _.._ ____-__.
<br />2 nears iu 111 r:vhrr lh:ul____ ____ ___ ___
<br />5 our. iu In r:u'li~•r lb:w__ ______ _____ ___ _
<br />IG° 1'. nr li~o'cr 120° I''. .n' Imcnr I ''!d° I'. or Lncrr
<br />April li___. r\pril?:. ___ \I:q'.I __
<br />April II_.____ April 1~ __ April '!S.___..
<br />\larrh :fl_. ___ Aln'il7 .___ April 17,._. _.
<br />Orln6rr?d _ (Irlnbrr L1__ _~ Urlohrr :t___--
<br />l lrlnhrr'!!L__ (h'Inhrr I!I____ Ucl nl yr .ti. -
<br />Nnerwbrl K __ llrl~~br1''!P____ Url olrrr I:1 _
<br />''!.4° P..n burr j° 1+. °r lnrver
<br />r\pril '!i .. _._ ?lac II.
<br />~rp1 r111L~•r •!.}.. S~•plrlnhcr I:I
<br />vrplrmbrr :.11_.. ~"plrmhrr LY
<br />Urlnbrr IIL_.. M1rplenlhrr "y
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