Boron (B) is an important micronutrient. It is used by the corn plant for sugar translocation and carbohydrate metabolism. It also plays a factor in pollen development and seed set. The primary source of B is soil organic matter.

How much boron does a corn crop need?

If a soil tests very low in boron for continuous corn, an application of 1 lb/a of actual boron every 2–3 years should be sufficient. Crops vary in their need for boron. Crops with a high requirement include alfalfa, beet, canola, cauliflower, celery, sunflower, tomato, birdsfoot trefoil, and forage brassicas.

What does boron do in fertilizer?

Boron plays a key role in a diverse range of plant functions including cell wall formation and stability, maintenance of structural and functional integrity of biological membranes, movement of sugar or energy into growing parts of plants, and pollination and seed set.