Among all trace elements, boron deficiency is the most common in China. The boron absorbed by plants is mainly from the soil, and the boron content of the soil is very important for plants. The amount of boron in the soil is closely related to the parent material, soil type and climatic conditions. Boron in soil can be simply divided into full boron and effective boron. The total amount of boron in the soil refers to the sum of boron present in the soil, including the available boron of the plant and the boron that cannot be utilized. Soil available boron refers to boron that plants can absorb from the soil. Therefore, the lack of boron in the soil depends entirely on the effective boron content of the soil.
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