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Plow pan is one of the main obstacles to high production of agricultural plants in Chongqing, China. As a minimal tilling method, subsoiling can break the plow pan and help the growth of agricultural plants. There are two subsoiling methods: vibrating subsoiling (VS) and traditional subsoiling (TS). A soil model with upland field features in Chongqing was established for DEM-based simulation. The simulation was validated by field experiments, in items of soil looseness, coefficient of soil disturbance, and cross-section of tillage, the errors of the simulated and experimental values of the soil looseness and soil disturbance coefficient of TS and VS were 12.9% and 14.7%, respectively. Compared with TS, VS resulted in lower soil looseness, higher coefficient of soil disturbance, smaller width of upper furrow, and lighter damage of tillage layer, and no obvious overturn of soil blocks was observed for the VS. Compared with TS, vibration helps improve the tillage performance of subsoilers.

Slavery plays an important role in studying the history of Cape Town and South Africa. The beginning and the development of slavery were naturally accompanied by the slave uprisings. The history of Cape Colony has seen two major ruling governments, the Dutch East India Company (VOC) and the British Empire. There was no organized resistance that occurred in Cape Town during the VOC period. However, a series of slave improvements by the British government led to the outbreak of the revolt. In contrast to the harsh laws of the VOC period, the British kindness to the slaves freed them from their shackles and led to the outbreak of the revolt. The British policy to improve slavery seems to have changed the psychology of slaves, accelerated their desire for the abolition of slavery, and led to the occurrence of revolt. This seems “Unthinkable” to the British government. Although the slave revolts that happened in Cape town are valuable for studying the history of slavery, scholars and the public have overlooked this part of history. This essay aimed to analyze the Behavior of slaves to understand and encourage people to analyze historical events and figures through psychology.