Potassium Deficiency
scouted June 3, 2024
- Background
- Soybeans were scouted at the V5 growth stage and yellowing of lower (older) leaf margins were observed. Damage observed was widespread and consistent.
- Conclusion
- This issue was confirmed by an NC State Extension Specialist as a Potassium (K) Deficiency. Yellowing of leaf margins, stunted plants, and slow growth can be associated with a potassium deficiency. Soybeans require a high amount of potassium, and uptake of K is driven by diffusion. In an environment of droughty conditions, a K deficiency may be seen. A potassium deficiency may also be observed through leaching in an environment with coarse textured soil. The best way to ensure and maintain the correct nutritional needs for a field is to conduct soil sampling every 1 to 2 years.
