Abstract
Abstract This study reports an interaction between copper nutrition of wheat and application of gypsum. A pot experiment and two years of field trials on a sandy duplex soil in the southern Wimmera, Australia showed that the efficacy of copper applied to the soil is increased by the application of gypsum. Severity of attack by the fungus Gaeumannomyces graminis (take‐all) was greatly reduced in the pot experiment by the addition of either copper or gypsum to the soil. In the second year of the field experiments, copper deficiency occurred only on areas which had been ripped. These results are discussed in relation to factors controlling the availability of copper in soil.
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