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<br />-- <br /> <br />,"'" .... <br />'1' c. ,'~ <br />'OJ 10,> <br /> <br />(Il'IVentory of "hysical factors) <br /> <br />Seils <br /> <br />. <br />. <br /> <br />The Arkansu River Valley bottom soil il alluvium. In the north- <br />west corner Pierre shale is found, whereas south of Manzanola, Vroman, <br />and Rocky Ford there are scattered areas of the Ogallala forrrntion. The <br />remainder of the area is underlain by members of the Niobrara group. <br /> <br />Soils of the area vary from fine ~andy loam to clay. The texture <br />in azv given locality is largely dependent upon the underlying parent <br />formation. The predominate soil texture is clay lo~which is found <br />south of and between Rocky Ford and La Junta. North of Rocky Ford, a <br />large body of olay soil is found. About half of the land with clay <br />loam or olo.y soil i's Class 2 lc.nd. This soil ho.s good depth o.nd good <br />water-:holding "ap,9-c ity:, ,but the, permeability is o~y fc.ir.. ]3e1;we~~ _ _ <br />Rocky Ford o.nd the west end of the o.reo. wide variations in the soil <br />texture ocour. ,Land- lying a short disto.noo south' of the river ie'-pri'n-: <br />cipally fine sandy loam ,>ith smnller aroas of olay loam and oiay. ~ine <br />so.ndyJ,otlin \;s derivod largely from the OgaUalc. formation c.ndthe=:C"ro.y <br />loam-";,ir,olay, ffom the Niobrara grrop. Foxthor south of tho_ffiiJ:_:=- <br />sandy loam soil, the clay loam and clay soils appeo.rcd in 0. mCljority <br />of the soil profiles. Pro.ctically all fine sandy loo.m soil and clo.y <br />loam soil in this part of the areo. is Class 1 lo.nd. These soils are <br />generally very productive, havo good depth, good water-holding co.po,city, <br />and fair to good pormoo.bili ty. <br /> <br />The land in Class 2 has 0. hoo.vior texture particularly in tho <br />subsoil. <br /> <br />Tho lend in Cless 6 is found in the ri ver bottom areo.S and in <br />nnrrow strips o.long tho Apishc.pa Creok, Patterson Hollow, Timpo.s Creok, <br />o.nd Crookod Arrayo. This lo.nd is unproduotiw, ho avy , und poorly <br />drainod. <br /> <br />~ <br /> <br />Topop:ro.phy <br /> <br />Tho topography of tho lower parts of tho r.rca vo.riea from rough to <br />lovol. Bronks llJ'e' foum o.long tho edgo of the ri vor bottom cnd also <br />along tho tributaries. <br />, <br /> <br />. <br /> <br />--- <br /> <br />. <br /> <br />Tho rivor bottom and tributary vclleys are out into small fiolds, <br />nnd ho:ro no uniformity of topography. Sorno fiolds !\TO lovel and sorno <br />rough. Thoro !\TO no lo_rgo bodies of irrigutod land in the river bottom. <br /> <br />18 <br /> <br />, <br />