Boron is an indispensable trace element for vegetable growth. Boron fertilizers suitable for vegetable production include the following:
Borax is a white powder, translucent and finely crystalline. It is mainly used for soil fertigation, containing 11.3% of boron. It has low solubility in cold water and is easily soluble in hot water above 40°C. The saturated aqueous solution is alkaline and has a pH of 9.1-9.3.
Boric acid white fine crystals or powder, containing 17.5% boron, soluble in water, used for foliar spray.
Boron mud is the residue after preparation of borax and boric acid. It is an off-white powder with 0.5%-2% boron and 20%-30% magnesium oxide. The aqueous solution is alkaline. Due to the low boron content, it is only suitable as base fertilizer.
Boron-containing superphosphate contains 0.6% boron, yellowish-yellow powder, and the main component is soluble in water. Yi Ji Shi.
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