h2 Sanple Soil All Soil sarmles Jisted be7ow were obtcined by Dr. L. Te Mexarer ard exiracted at the Suil Swvey Laboratory, U.S. department cf Apracuiture, Beltsvilie, Maryland. During the Serine of 1956, the Beltsville laboratory discontinued the enmneniunm acetate extraction procedure in favor of elevtrcdialvsis extraction. The method of extraction is indicated for eaen sample, Soil Survey Laboratory enalyses on these samples include the determination of Wa, K, Mg, Ca ani Sr, Chicage Milkshed: Collected by Dr. L. ‘lexander, Soil Survey LaLovratory, Plant Industry Statior, ", S, Depart- ment of igrivuiture, Belteville, iferyland, and Dr. E, «A. Martell, Enzicco Fermi Institute for Nuclear Studies, University of Chicago, Chicago, Illinois, September 29 and 30, 1955, 1. CL 1019: ‘ Swanson Farm (#73), Winnebago County, Tilinois., Carrington-like silt loam, Reitsville 6.83 {+ tte 0.08 + Ve SunshineUntt: —— - 1.0 #551503, Wi) iC extraction-of 4 Iss, soil, 0-8" depth, 20.0 g oxalate, 7.5: g oxide, 5.39 g Ca, 2. Holcomb Tarm (ih), Hock County, “isconsin, Carrington silt loam, a. CL 956: Beltsville #551500, NH)C extraction 26.7 be Beltsville #551501, NHC extraction 3.81 + 0,1b of | lbs. soil, 0-2" depth, 12,1 6.82 g oxide, 3.06 g Ca. CL 0°57: g oxalate, of h lts. soil, 2-6" depth, 12,1 g oxalate, 6.21 ¢ oxide, 3.18 ¢ Ca, 3. CL 1018: Preme Farm (#6), Columbia County, Wisconsin, Miami silt loam, Beltsville #551502, NH),.c extraction of k lbs. soil, 0-6" deoth, 11.25 g oxalate, 3,9) g¢ oxide, 2.79 g Ca, h. KXurpeski Farm (#7), McHenry County, Illinois, 15.0 + 0.5 ~ Miani silt loam, a, CL &86: Beltsville #551196, Sample 1, NH)..C extraction of k lbs. soil, 0-6 or 7# senth, 8.51 g oxalate, 3.21 g oxide, 2.2) g Ca, 11.9 + 0.5 b. CL 887: Beltsville #551197, Sample B, NH),..C 12.6 + 0.5 extraction of ) lbs. soil, 0-6 or 7" depth, NYGO 68.90 g oxalate, 3.35 g oxide, 2.36 g Ca, 13 A