The study looked at how different types of fertilizers affect soil quality and vegetable yield. They tested three fertilization methods on cabbage, brassica chinensis, and corn: no fertilizer, chemical fertilizer, and chemical fertilizer with organic manure. The results showed that using organic manure led to higher levels of arsenic, lead, and chromium in the soil, as well as lower pH in alkaline soil. However, it also increased soil organic matter, available nitrogen, phosphorus, and potassium, leading to higher vegetable yields. This suggests that using a combination of chemical fertilizer and organic manure can improve soil fertility and increase vegetable production.