Boron Deficiency in africa

Throughout Africa, soils can benefit from application of refined boron. Of course, this vast region comprises a multitude of climates, soil types, and crops. Yet frequent droughts and pervasive sandy soils mean that most growers here can see higher yields and greater ROI through the use of refined boron.

Boron is an essential micronutrient that affects plant growth and crop yield. Although raw or unrefined mineral sources are often promoted as being equal to refined boron, mineral boron products have several drawbacks. Our refinement process guarantees both purity (as opposed to raw minerals, which often contain contaminants like heavy metals) and water solubility (the main measure of how much boron is available to crops after application). The result is a higher value in use—and ROI.
U.S. Borax provides both crystalline pentahydrate borax (Fertibor®) and a granular form (Granubor® Natur). This type of borax provides 15% refined boron. The crystalline form is typically used in compound fertilizers or direct soil applications; the granular form is designed for NPK fertilizer blending, with a granule size of 2 to 4 mm. Granubor Natur is ideal for blending, thanks to this optimal granule size (which does not segregate from other nutrient particles), low dust, and high solubility. Granubor Natur is approved for blending around the world and has approval from the Soil Association Certification Limited of the U.K. for use in organic food processing.

Boron Deficiency in the Region

West Africa (including Burkina Faso, Cameroon, Chad, Ghana, Ivory Coast, Mali, Nigeria, Togo)
In West Africa, cotton is an important crop that depends on boron for healthy growth and yields. Along with oil palm, cocoa, and a variety of fruits and vegetables, cotton benefits from the application of refined boron throughout the growing season.
Learn more about West Africa
South Africa
In South Africa, many growers are aware of the benefits of boron on crops’ ability to use macronutrients, as well as the various methods of boron application. A range of crops here—including grapes, sunflowers, and various vegetables—benefit from boron supplementation.
Learn more about South Africa
Southeast/East Africa (including Ethiopia, Kenya, Mozambique, Tanzania, Zambia, Zimbabwe)
In this region of Africa, agricultural investment and government support of the industry is making inroads. In Ethiopia, for example, the government is sponsoring the use of macro- and micronutrients—a practice that can make a huge difference in growers’ success. It’s an exciting time for agriculture.
Learn more about Southeast/East Africa
Central Africa (including Central African Republic, Congo, Uganda)
Growers in Central Africa know the value of refined boron application on crops such as cassava, corn, cotton, coffee, tobacco, groundnuts, bananas, and oil palm. Boron deficiencies in oil palm, for example are seen as hook leaf, poor seed set, deformed leaves, and stunted plants with areas of necrosis.
Learn more about Central Africa

U.S. Borax has been the principal supplier of boron to the West Africa cotton blending market (total annual consumption of 5,000 to 10,000 tons—4535.92 to 9071.85 metric tonnes—of pentahydrate borax per year) for many years.


To understand the role of boron in crop health and develop the best available products, U.S. Borax has been conducting and participating in field studies for more than 50 years. These studies provide important information for African growers and distributors.
  • Corn (1973), South Africa
  • Avocado (1991), South Africa
(Not all studies are available online.)

U.S. Borax, part of Rio Tinto, is a global leader in the supply and science of borates—naturally-occurring minerals containing boron and other elements. We are 1,000 people serving 500 customers with more than 1,700 delivery locations globally. We supply 30% of the world’s need for refined borates from our world-class mine in Boron, California, about 100 miles east of Los Angeles.  Learn more about Rio Tinto

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