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r .~ _ <br />f _,e ~.~ ~ .• • <br />~., ~ <br />r p ~ITE N0. 289 Page 3 <br />.CLAYEY FOOTHILLS <br />August 1975 <br />4. Total Annual Production <br />Favorable years 1200 Pounds per Acre Dry Air <br />Unfavorable yea r5 < 6-00 " " <br />Median years ~y00. " " " " " <br />' -- - <br />5• Soils <br />a. Soils are mainly derived from marine shales. They are deep <br />to moderately deep and are generally rock free. Surface <br />textures are mostly clay or clay loam. In some cases there <br />is a thin loam surface layer, but the major influence is <br />from heavier material. There is generally a well developed <br />textural B horizon. Permeability is slow, but excellent <br />storage of water favors extension of growth into dry weather. <br />However, the high wilting point can be a sfgnlficant factor <br />in dry summers. The shrink-swell potential is high. These <br />soils are subJect to severe water erosion if plant cover is <br />weakened . ~/h,o.F <br />.~ b. Soils in this site are: : 8 D 89 B <br />I a.~lk/v. alp loom ~ BH,Ik/ c r <br />,1 ~'1~ Carmackyclayy ~3t~38Af 58~ ~ <br />Colona silty clay loam /I'' XbF - Bwlk/~v(Pan.~'} <br />lr~~m 79 ~~ 190 E' ca,n,Oq/rs -tCs <br />Hott clay loam X~gAE ~ a <br />lockerby clay loam (all phases) X Jlp - Ya~~ CP°~) <br />Yamac loam <br />6. Rare, Threatened or Endangered Plants and Animals 3Z ~ - yar•.ac loa.v..~ <br />(To be added when known) <br />7. Location of Typical Example of the Site <br />Colorado Division of Wildlife land, Sunnyside Area, northwest <br />of Col bran, Mesa County <br />Doug Hindmarsh range just west of Mesa Verde National Park <br />entrance and north of H(way 160, east of Cortez, Montezuma <br />County. ~ <br />Chor cal ol~5 f(nr~ /It6r FOrt~fiCn riOn nocJ(S <br />~~ 1 <br />