What are the deficiency symptoms of zinc (Zn) in corn?

The deficiency symptoms of zinc in corn typically manifest as patches in the growth stage between the 4-6 leaf stage. This is linked to zinc’s crucial role in the synthesis of certain enzymes and proteins essential for plant growth. When corn experiences zinc deficiency, the plant struggles to develop properly, leading to observable irregularities in growth, specifically in younger leaves, resulting in the mottled or patchy appearance. Recognizing this stage is vital for effective nutrient management, allowing for timely intervention to rectify the deficiency.

In contrast, other symptom descriptions do not correspond with zinc deficiency. Broad, whitish stripes and grey speck-like spots are symptoms often associated with other nutrient deficiencies or conditions. Stunting of plants with purple undersides more commonly indicates phosphorus deficiency, rather than zinc. Understanding these specifics can greatly assist in diagnosing and addressing nutrient issues in corn cultivation accurately.