When a grower walks a field and spots stunted plants or a lower harvest than expected, the conclusion is usually simple: the crop was stressed. But here's what's rarely considered, that stress had likely been building for weeks before anything was visible. Long before a leaf shows signs of struggle, the plant's internal chemistry is already under pressure. Abiotic stress, drought, heat, salinity, waterlogging, nutrient imbalance, is the single biggest constraint on global cro