Supplementary nutrients - trace elements

Acceptable, but not for regular use

• Rock dust and stone meals if by-products of the quarry industry
• Seaweed meal
• Seaweed extracts

The following can be used to correct severe nutrient deficiencies;

• Sulphur dust or chips
• Calcium chloride solution, for treatment of bitter pit in apples
• Epsom salts, for acute magnesium deficiency
• Fertilisers and liquid feeds containing boron, copper, iron, molybdenum, cobalt, selenium, zinc, sodium (as granular rock salt).