Basal applications of copper sulfate to deficient soils increase plant growth and resultant yield, as shown in trial in India.
Trial in India also shows that crop quality was improved by stimulating good growth through a balanced nutrition with copper.
Ascorbic acid content is also increased when copper sulfate is applied.
Reports of copper deficiencies are rare in greenhouses. In field cultivation, they are most likely on sandy or organic soils. Basal applications of copper sulfate to deficient soils increase yield and quality of tomato crops.