One of the micronutrients that is essential for crop health also happens to be one of the most deficient in the majority of fields: boron.
Boron (B) is vital to plant health, due to its role in forming and strengthening cell walls. Low boron levels lead to poor growth of fast growing tissues and plant development. Different plants need different amounts of boron, but for the most part, boron is not easily transported within the plants. For that reason, boron should continuously be available for uptake by the roots, and especially prior to flowering, as it is vital to the reproduction process.
Boron’s role in forming and strengthening cell walls is critical. However, concentration of boron is different among species — dicots require higher levels than monocots, and therefore demand higher boron levels in the soil. Boron deficiency results in short, thick cell walls, and root and pollen tube elongation is inhibited. Flowers can fail to set seeds. And research also shows that boron is important in nitrogen fixation and nodulation in legumes.