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How can soluble borates correct boron deficiency in soil?

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A labeled diagram of the periodic table entry for boron shows its atomic number 5, symbol B, electron configuration, atomic weight range, and classification as a solid, weakly acidic, other nonmetal with a rhombohedral crystal structure at room temperature. — boron Properties of boron.

Boron deficiency in soil can be corrected by the application of soluble borates, which provide the trace amounts of boron necessary for the normal growth and functioning of plant apical meristems.1

While boron is essential for many land plants, it is required only in small quantities; therefore, care must be taken during application, as excess amounts of borates can act as unselective herbicides. Borax, a common borate, is frequently utilized as a fertilizer additive to address such deficiencies. By providing this essential nutrient, the treatment helps prevent disorders associated with boron deficiency, such as stunted growth, vegetable "brown heart," and "dry rot" in sugar beets.12