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Rnoor* on Soi + _Samoles ,_ Dra na_seT�,rea, <br /> Coai Mline 3as n near Redstone, Colorado <br /> Ire area, 1ocatt:d in Coal ^:;sin ear Redstone, Colorado, was exaii17ned <br /> on Septem`:er 18, 1979 [see for sample location) . FCurt`en soil samples <br /> .ere taken at this tine for analysis . At each point, about 5 core samples <br /> 'mere ta' en to the derth of `he restricting boulder layer and combined to <br /> form a representa;.,'!e sample. The samples ti'.ere air-dried and sub;pCted <br /> 1.0 chemical analysis . The 11ancos Shale samples .,e:"e coa?'rely ground before <br /> they were analysed. <br /> Met-hods: <br /> Salinity Extract - Di sti 11 ed v,a ter ',ias rieasur_d into the samples Io <br /> t ,e point of saturation to obtain saturation percentages. After deter- <br /> mining the pH of the pastes , they were s.b`;Gc ed . to vacuum fi:1 trat ion <br /> an,' the electrical Conductivity of the e/,r acts l ere de-ern ined. Ca1c'Ui1, <br /> Tnagnes um and SO'.i uri COnCentra tions 'ver? measured by a'OT.i C aOSOrp 7 10,11 <br /> spectroscopy, and the sodium absorrti:n ratios were calculated fro;n the <br /> en Sung data. <br /> Fertility Components onents - The samples ':iere extracted 'w4 tr an am—on-u n <br /> bicarbonate - UT'' 'solution. Nitrate-nitrcgen and phosphorus were <br /> deter�,li-ed colorimnet•.'ically and po`asslumi, iron, ^ansaneSe, copper a^d <br /> Zinc Concentrat ,ons were d2tarmined by atomic absor,"Gn spectroscopy. <br /> Percent OrganicMatter - ('rganic matter content of the i ,,d_eria i -+•,-as <br /> determined by digestion with acid and subseque!it f Cr i"Oils Sll lfate t7trati'�n. <br /> Particle s?.-0 dismbut-ions 'rrere not- det-_r,iiifie^ or. the soils since <br /> they conzalned a c-, eat a%?_lint of or�wniC r:,di t'f i';niC`i 15 CO1.7On to <br /> forest soils . O'"^'nimatter Nr05c:;1t in l =r, a"110U. ntS tot';j� <br /> *Exhibit III-G-2 in map jacket . <br />