Boron deficiency-Coffee

Symptoms
Deficiency symptoms are visible on younger leaves and on the growing point of the plants. The leaves are light green and mottled, the new developing leaves have an asymetric shape with uneven margins and necrotic spots. Furthermore the terminal buds are dying back. The tree produces secondary branches resulting in a deformed, fan-shape bush.

Reasons
Boron deficiency Calcium deficiency also shows bronzing of the youngest leaves and necrosis of emerging leaves, but bronzing starts at the margins and leaves are cupped downwards. Emerging leaves do not have an asymetric form.