The study looked at how different crop rotations and fertilizers affect crop productivity and soil health on drained soils. They found that using a mix of mineral fertilizers and by-products in crop rotations with corn can increase grain yields. Crop rotations with corn had higher yields compared to those without corn. Using organo-mineral fertilizers with by-products helped improve soil fertility and profitability. The researchers recommend adjusting crop rotations based on market conditions and farm resources. By using by-products instead of manure, farmers can maintain crop productivity and soil health without livestock.