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Science 23 December 1977:
Vol. 198. no. 4323, pp. 1252 - 1254
DOI: 10.1126/science.198.4323.1252
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Articles

Calcium Oxalate: Occurrence in Soils and Effect on Nutrient and Geochemical Cycles

WILLIAM C. GRAUSTEIN 1, KERMIT CROMACK JR. 2, and PHILLIP SOLLINS 2

1 Department of Geology and Geophysics, Yale University, New Haven, Connecticut 06520
2 Department of Forest Science, School of Forestry, Oregon State University, Corvallis 97331

Whewellite and weddellite, calcium salts of oxalic acid, have been found in the litter layer of several different soils, indicating that oxalate is a major metabolic product of fungi in natural environments. The presence of oxalate in soil solution speeds weathering of soil minerals and increases the availability of nutrients to vegetation.

Submitted on June 21, 1977
Revised on August 9, 1977


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