Artificial vegetation in the Loess Plateau was studied to understand how soil moisture changes with depth and over time. The researchers used a special device to measure soil moisture and water potential. They found that soil moisture decreased as you went deeper into the soil, stabilizing around 0-300 cm depth. Precipitation had a big impact on soil moisture, with shallow soil getting more moisture in rainy years. This study helps us understand how to manage soil moisture for better vegetation growth in different weather conditions.