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Carbon Dioxide from Plant Roots as a Factor in the Replacement of Adsorbed Sodium in Calcareous Soils
Author(s) -
Goertzen J. O.,
Bower C. A.
Publication year - 1958
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/sssaj1958.03615995002200010011x
Subject(s) - soil water , chemistry , calcareous , leaching (pedology) , adsorption , dissolution , moisture , leachate , land reclamation , carbon dioxide , environmental chemistry , sodium , water content , soil science , environmental science , botany , geology , history , geotechnical engineering , organic chemistry , archaeology , biology
The effects of CO 2 from plant roots in facilitating the dissolution of CaCO 3 and the reclamation of sodic soils was studied by comparing the HCO 3 ‐ concentrations of leachates and the less of adsorbed Na from pots of cropped and uncropped soils receiving uniform leaching with salt‐free water. It was found that the effect of CO 2 on the replacement of adsorbed Na was measureable but small, and of less importance than the effect brought about by the hydrolysis of CaCO 3 upon leaching. Data were obtained which indicate that alfalfa roots release more CO 2 than Rhodesgrass roots, and that more of the CO 2 is retained in the soil at high moisture levels than at low moisture levels.