The study looked at how rainfall runoff is affected by different types of crops in the Huaibei Region. By analyzing historical rainfall data and conducting experiments, researchers found that planting crops like soybeans can reduce runoff and soil erosion caused by heavy rain. They discovered that the type of crop vegetation influences the amount of runoff generated, with soybeans being the most effective at reducing runoff during the flood season. This information can help farmers in the region better manage their land to prevent water pollution and soil loss.