The study looked at how different ways of preparing the soil and using nitrogen fertilizer affect the yield of wheat and maize crops. They found that using less nitrogen led to lower yields for both crops. However, under certain tillage methods, reducing nitrogen actually increased the weight of wheat grains. Overall, the best results were seen with harrow tillage and no-tillage using 100% nitrogen. These methods not only produced higher yields but also had better economic benefits. So, using harrow tillage or no-tillage with full nitrogen can help farmers grow more wheat and maize efficiently.