| abstract |
a granular fertilizer product having at least two sources of boron having different solubilities to suit the availability of boron throughout the growing season of a plant, while reducing the risk of boron toxicity. a first source of boron may include a sodium-based or highly water-soluble boron compound, such as sodium tetraborate and / or boric acid, while a second source of boron may include a calcium-based boron compound, such as colemanite (cab3o4 (oh) 3. (h2o)) (for example, when the carrier fertilizer is based on n or k) and / or boron phosphate (bpo4) (for example, when the carrier fertilizer is based on p) . the solubility of the first source of boron is greater than the solubility of the second source of boron, so that the sources of boron have different rates of release into the soil. |