A new study using a LARGE dataset has found for corn and soybean:
- Analysis of 748,374 yield records showed a 4.3% yield penalty for continuous corn.
- Corn yield penalties were more severe in areas with low moisture and low yields.
- Continuous soybean showed a 10.3% yield penalty, worse in low-yielding years.
- Corn yield penalties grew with up to 3 yr of continuous cropping, but not more.
- Soybean penalties increased monotonically with number of years continuously cropped.