wm | 39 Sample VI ° Sunshine Units Soil All soil samples listed below were obtained by Dr. L. T, Alexander and extracted at the Soil Survey Laboratory, U.S. Department of Agriculture, Beltsville, Maryland. Note that most soils have been extracted with normal natural ammonium acetate which is a measure of the strontium and calcium available for plant uptake and not of the total soil concentration, Soil Survey Laboratory analyses on these samples include the determination of Na, K, Mg, Ca and Sr. Chicago Milkshed Soils; Collected by Dre Le T. /lexander. (Milk and alfalfa samples similarly numbered were collec- ted at the same location and date, 1. 1953 collections ae Grabow Farm (#1), Rock County, ‘Wisconsin, Knox fine sandy loam, collected September 28, 1953. (1) CL 106: Beltsville #531665, NH).AC extrac- tion of 8 lbs. soil, O-1" depth, 12.65 g 26.3 + 1.0 oxalate, 4.87 g oxide, 3.48 g Oa. (2) CL 107: Beltsville #531666, NHC extrace- tion of 8 Ibs. soil, 1-6" depth, 10.87 ¢ 6.7 + Ook oxalate, 4.18 g oxide, 2,98 g Ca. (3) CL 137: Beltsville #531665, 8 lbs, soil leached with HCl after NH)..0, O-1" depth, 24.6 + 0.8 3,83 g oxalate, 1.46 g oxide, 1.64 g Ca. (4) CL 1h3: Beltsville #531665, calcium oxalate from 200 g soil fused with sodium carbonate following extraction with NH)4iC and HCl, 6.95 + 0.20 ~ O-1" depth, 0.578 g oxide, 0.28 g Ca, be Swain Farm (#2), Rock County, Wisconsin, Knox fine sandy loam, collected September 29, 1953. (1) CL 132: Beltsville #531667, NHC ex- traction of 8 lbs, soil, 0-1" depth, LO.1h g oxalate, 14.9 g oxide, 7.75 g Ca. (2) CL 133: Beltsville #531668, NHC extrac- tion of 8 lbs, soil, 1-6" depth, 27.69 ¢g oxalate, 10.2 g@ oxide, 7.25 g Ca. 7036 + 0433 ~ 2.20 + 0423 DOE ARCHIVES a an