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Isotopically Exchangeable Cobalt: The Effect of Soil pH and Ionic Saturation of the Soil
Author(s) -
Gille G. L.,
Graham E. R.
Publication year - 1971
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1971.03615995003500030026x
Subject(s) - cobalt , chemistry , saturation (graph theory) , agronomy , environmental chemistry , inorganic chemistry , soil science , environmental science , mathematics , combinatorics , biology
Large increases in the uptake of Co, Zn, and Mn by sudangrass ( Sorghum vulgare sudanense ) were observed when FeCl 2 , AlCl 3 , and CaCl 2 were added to the soil in which the plants were grown. The isotopically exchangeable cobalt in the soil remained unchanged regardless of soil pH or the addition of Fe, Al, or Ca to the soil. Increases in the cobalt content of sudangrass result from changes in the soil solution concentration of cobalt in the soil rather than quantity of cobalt. The effect of Fe, Al, and Ca additions and soil pH in producing the changes in cobalt content of sudangrass was caused by soil factors rather than changes in plant response. One hundredth normal HCl was found to be a useful extracting agent for determining the quantity of cobalt in the soil and 0.1 M CaCl 2 would give the best indication of the potential soil solution concentration ( I ) of cobalt in the soil.