What are disadvantages of low tillage?

Low tillage can lead to several disadvantages, including reduced soil aeration and compaction, which can affect root growth and water infiltration. Additionally, it may result in increased weed pressure, as some weeds thrive in undisturbed soils. There is also a risk of nutrient stratification, where nutrients accumulate at the surface rather than being evenly distributed throughout the soil profile. Lastly, low tillage can contribute to pest and disease buildup if crop residues are not managed properly.