Coffee

Coffee and Important Nutrients for high yields

Nitrogen

•    improves vegetative growth
•    increases crop bearing capacity
•    increased bean size

Phosphorous

•    roots and bearing wood development
•    early berry maturity
•    bean density

Potassium
•    berry development and ripening
•    mucilage formation
•    water utilization efficiency

Magnesium
•    enhances bean colour (blue/green grey colour)
•    food formation

Zinc
•    plant hormone
•    influences leaf size
•    intensifies flower initiation and formation

Boron
•    promotes shoot growth
•    facilitates optimal flowering and fruit setting

Sulphur
•    enhances aroma of the liquor

Molybdenum
•    enhances Nitrogen metabolism

Typical Coffee NPK fertilisers are as follows:

NPK 15-5-20+te
NPK 17-17-17
NPK 20-10-10
NPK 22-6-12+S+MgO+Zn+B

Amount of trace elements are adjusted to meet local requirements.

A rule of thumb application recommendation is 250 kg/tree of NPK during the season. Normally the first application (125 g/tree) is approx 6 months before flowering and the second application (125 g/tree) is after flowering, when berries start to grow. it is also recommendable to have soil analysis every third year to fine-tune nutrient contents.

In East Africa, another general rule is that you need 1 kg of Nitrogen to be able to grow 10 kg of coffee berries. If your target yield is 2000 kg/ha of berries,  you need to apply 200 kg/ha of Nitrogen.

 Photo: Arabica coffee growing in Ethiopia

 

Robusta in Uganda

 

Flowering Robusta in November

 

Robusta coffee berries

Tailor made robusta NPK 18-5-14+te applied by hand

 

 

 

 

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