Soil Solution Boron

In soil solution, boron mainly exists as undissociated acid H₃BO₃. Boric acid (also written as B(OH)3) and H₂BO₃
are the most common geologic forms of boron, with boric acid being the predominant form in soils as reviewed by Evans and Sparks (52). They further reported that boric acid is the major form of boron in soils with H₂BO₃
being predominant only above pH 9.2. In their review, they stated that boron occurs in aqueous solution as boric acid B(OH)3, which is a weak monobasic acid that acts as an electron acceptor or as a Lewis acid.