Summary
The availability to oats of adsorbed sulphate in soils and of sulphate impurity in calcium carbonate was studied in pot-culture experiments.
When calcium carbonate was added to soils with pH values ranging from 5.7 to 7.4 the uptake of sulphur by oats was increased, due probably to enhanced mineralization of soil organic sulphur. When the calcium carbonate contained sulphate impurity the uptake of sulphur was further increased by an amount comparable with the release of sulphate which could be expected from a reaction of the calcium carbonate with the exchangeable hydrogen of the soil. Sulphate in excess of this amount appeared to be largely unavailable. Uptake of sulphur by oats from calcareous sands containing large amounts of insoluble sulphate associated with calcium carbonate also suggested that soil sulphur in this form had very low availability to plants.
Substantial increases in the amounts of sulphur extracted by reagents commonly used for the determination of adsorbed sulphate in soils occurred when soils were airdried at about 20°C. Decreases in adsorbed sulphate in soils following the growth of oats in pot culture confirmed that adsorbed sulphate is readily available to plants.
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References
Ellet, W. B. and Hill, H. H., Effect of lime materials on the outgo of sulphur from Hagerstown silt loam soil. J. Agr. Research38, 697–711 (1929).
Ensminger, L. E., Some factors affecting the adsorption of sulphate by Alabama soils. Soil Sci. Soc. Am. Proc.18, 259–264 (1954).
Freney, J. R., Determination of water-soluble sulphate in soils. Soil Sci86, 241–244 (1958).
Fuller, W. H. and Flocker, W. J., The uptake of radio-strontium by certain type crops from calcareous soils. Arizona Agr. Exp. Sta. Tech. Bull.130, (1955).
Johnson, C. M. and Nishita, H., Microestimation of sulphur in plant materials, soils and irrigation waters. Anal. Chem.24, 736–742 (1952).
Kilmer, V. and Nearpass, D. C., The determination of available sulphur in soils. Soil Sci. Soc. Am. Proc.24, 337–340 (1960).
Neller, J. R., Extractable sulphate-sulphur in soils of Florida in relation to the amount of clay in the profile. Soil Sci. Soc. Am. Proc.23, 346–348 (1959).
Piper, C. S., Exchangeable hydrogen in soils. J. Council Sci. Ind. Research Australia9, 113–124 (1936).
Spencer, K. and Freney, J. R., A comparison of several procedures for estimating the sulphur status of soils. Australian J. Agr. Research11, 948–959 (1960).
Steinbergs, A., Iismaa, O., Freney, J. R., and Barrow, N. J., Determination of total sulphur in soil and plant material. Anal. Chim. Acta.27, 158–164 (1962).
White, J. G., Mineralization of nitrogen and sulphur in sulphur-deficient soils. New Zealand J. Agr. Research2, 255–258 (1959).
Williams, C. H. and Steinbergs, A., Soil sulphur fractions as chemical indices of available sulphur in some Australian soils. Australian J. Agr. Research10, 340–352 (1959).
Williams, C. H. and Steinbergs, A., The evaluation of plantavailable sulphur in soils. I. The chemical nature of sulphate in some Australian soils. Plant and Soil17, 279–294 (1962).
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Williams, C.H., Steinbergs, A. The evaluation of plant-available sulphur in soils. II. Plant Soil 21, 50–62 (1964). https://doi.org/10.1007/BF01373872
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DOI: https://doi.org/10.1007/BF01373872