Yellowing in Maize After Application of Mineral Potassium Fulvate
1. Background A maize grower in Hainan, China reported an unexpected phenomenon: During the early growth stage, maize treated with mineral-derived potassium fulvate showed vigorous growth and strong seedling establishment. However, at the mid-growth stage (pre-tasseling), plants began to show leaf yellowing symptoms. In contrast, control plots without fulvic acid application showed no yellowing, despite …
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