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Published in Soil Sci Soc Am J 38:341-346 (1974)
© 1974 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Effects of Calcium Carbonate on the Availability of Nutrients in an Acid Soil1

K. R. Helyar and A. J. Anderson2

ABSTRACT

The four pasture species alfalfa (Medicago sativa L.), subterranean clover (Trifolium subterraneum L.), Harding grass (Phalaris tuberosa L.), and perennial ryegrass (Lolium perenne L.) were grown in pots on an acid sandy loam soil treated with CaCO3 and H2SO4 to give a pH (0.01M CaCl2) range from 4.0 to 5.0.

Calcium carbonate application increased exchangeable calcium and decreased exchangeable aluminum and manganese but had little effect on the exchangeable levels of other cations. All soil solution cations except calcium decreased in concentration with CaCO3 application. These trends are explained in terms of effects of CaCO3 on the exchange equilibria through effects on the exchangeable levels of calcium and aluminum and on the cation exchange capacity. Soil solution sulfate levels were increased by liming while phosphate and nitrate levels were decreased.

Effects of H2SO4 and CaCO3 on plant growth were explained as effects of aluminum toxicity at low pH and phosphorus deficiency at higher pH values. Nutrient concentrations in the plants generally followed the trends in the soil solutions. Some inconsistencies were interpreted as effects of aluminum toxicity.

NOTES

1 Contribution from Div. of Plant Industry, CSIRO, P.O. Box 1600, Canberra City, ACT 2601, Australia.

2 Research Agronomist, NSW Dep. of Agriculture, Wollongbar, N.S.W., formerly seconded to Div. of Plant Industry, CSIRO, Canberra, ACT 2601 and Research Scientist, Div. of Plant Industry, CSIRO, Canberra, ACT 2601, respectively.

Received for publication June 15, 1973. Accepted for publication December 13, 1973.






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The SCI Journals Agronomy Journal Crop Science
Journal of Natural Resources
and Life Sciences Education		 Vadose Zone Journal
Journal of Plant Registrations Journal of
Environmental Quality		 The Plant Genome
Copyright © 1974 by the Soil Science Society of America.