Here are some ways to conserve soil:

Crop rotation: Maintain soil fertility by rotating crops so they don't use the same nutrients from the soil each year. 

Organic growing: Reduce or eliminate synthetic fertilizers and pesticides, and add compost and manure to the soil. 

Cover crops: Plant cover crops to prevent erosion. 

Contour plowing and terracing: Reduce runoff by using these techniques. 

No-till farming: Preserve soil structure by using no-till farming. 

Windbreaks: Create windbreaks with trees or shrubs to reduce wind erosion. 

Organic mulch: Apply organic mulch to protect and enrich the soil. 

Retention ponds: Construct retention ponds to manage water flow and reduce soil loss. 

Buffer strips: Plant trees, grasses, or shrubs along the edges of farmland to improve soil structure, slow down surface runoff, and stop wind erosion. 

Terrace farming: In hilly areas, cut steps into the slopes of hills to slow down the flow of water and deposit soil removed from one step onto the next. 

Humic acids: Use humic acids to prevent excess salination, especially from over-irrigation. 

Salt-tolerant plants: Plant species that can tolerate saline conditions to lower water tables and reduce the rate of soil salination. 

Soil conservation practices can also increase biodiversity by creating a more stable and nutrient-rich environment