Boron deficiency-Coffee

Change crop

Nutrients

Coffee - Deformation

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.

Boron deficiency made worse by

Sandy soils
Alkaline soils
Soils low in organic matter
High levels of nitrogen
High levels of calcium
Cold wet weather
Periods of drought

Boron is important for

Improves flower bud development
Better quality of flowering
Improves the 'set' of fruit (beans)

Yara recommended fertilizers for Boron

YaraLiva NITRABOR

Coffee: Application 1: Pre-flowering stage @ 50 kg/acre; Application 2 : Berry formation stage @ 40 kg/acre; Application 3 : Berry development stage @ 40 kg/acre;