Final answer:
Good agricultural practices for soil preservation include vertical ploughing and afforestation. Sustainable practices like no-till farming, crop rotation, and organic methods also maintain soil health and reduce environmental impact.
Step-by-step explanation:
The good agricultural practices in the preservation of soil are A) Vertical ploughing and D) Afforestation. Vertical ploughing can help prevent soil erosion, while afforestation, which refers to the planting of new forests, can help improve soil stability and prevent erosion. Practices like overgrazing, over-fertilizing, and deforestation are not considered good practices because they can lead to soil degradation, nutrient depletion, and erosion. Sustainable agricultural practices include no-till farming, crop rotation, and the use of organic methods of fertilization and pest control, which can help maintain soil fertility and structure while reducing environmental impact.