The study looked at how different ways of preparing soil before planting wheat affect the crop's growth and yield. They tested zero tillage (no soil disturbance), reduced tillage (less soil disturbance), and conventional tillage (more soil disturbance). They found that using reduced tillage resulted in better soil quality and higher wheat yields compared to zero tillage and conventional tillage. Specifically, reduced tillage gave 4% to 17% more yield than zero tillage and conventional tillage, while zero tillage gave 13% more yield than conventional tillage.