This video discusses the damage of roots and nitrogen-fixing nodules to varying degrees of water stressed soybean plants. Saturated soils for extended periods will cause soybean yellowing in portions of or whole fields. Applying supplemental nitrogen in late vegetative stages (V4 onward) as soybeans transition to early reproductive stages (flowering) to these yellowish fields may help with nutrient needs while nodules are recovering from water-logged (oxygen-deprived) soils.