Reducing Corn Cob Defects
Phosphorus deficiency can cause the corn cob to be defective, by taking on a distorted, twisted appearance with poor grain set at the point of the cob.
Potassium deficient plants, show cobs smaller in size and can have incomplete corn grain set at the tip end.
Boron deficient grain set are restricted, with the corn cob having many missing kernels and a few large grains.
Copper deficient corn grains are deformed, leading to loss of yield and grain quality.