Chemical Studies of Infertile Soils Derived from Rocks High in Magnesium and Generally High in Chromium and Nickel

ChemIcal composition of the pnrent roek_ ___ 18 Re\"ic)[';!lf the Iiterature_____________________ 2 Availability oC chromium.nickel, and other constituents______________________________ _ , Descri~on of the samples___________________ 4 20 MeCi!1 '\1 31 comp!'~ition of the ~olls----------8 Toxicity oC chromium nnd nickel snlts ______ _ 23 Ohe compOSItIOn oC the solis____________ 10 Summary and conclusions___________________ 25 Literature cited____________________________ _ 1ft ChemIc composition of the soil colloids_____ 14 Zl .......