Glossary

A micronutrient is an essential element needed by plants in small amounts, such as iron, zinc, manganese, copper, or boron. Mangoes still need these nutrients, but the margin between adequate and excessive supply can be narrow for some elements. Symptoms can reflect poor availability at an unsuitable pH rather than absence from the soil. Identify the likely problem and use appropriate testing or advice instead of assuming that repeated mixed trace-element applications are harmless.