In July we had over 60 mph winds at our Walcott Iowa research farm and I noticed some stalk lodging.
As you may know, corn with lower than optimal potassium levels, yield less grain. On top of that, potassium deficiency also reduces stalk strength, causing both root and stalk lodging.
Potassium deficiency in soybean plants can be confusing. Typically in corn we see signs of deficiency worst at the bottom of the plant. This is because the nutrient is very mobile and potassium will prioritize leaves at the top of the plant. However, in soybeans, we often see the deficiency towards the middle to top of the plant with yellowing edges and necrotic leaf margins, while lower leaves can remain healthy and green.