What is the purpose of soil amendments?

The primary purpose of soil amendments is to improve soil structure and nutrient content. Soil amendments can enhance the physical and chemical properties of the soil, making it better able to support plant growth. This includes boosting nutrient availability, improving drainage and aeration, and enhancing the soil's ability to retain moisture. By adding organic matter or other amendments, the soil can become more fertile, which can lead to healthier plants and more productive gardens or agricultural lands.

Options that focus on increasing soil pH or reducing water evaporation might address specific issues but do not encompass the broader function of soil amendments in terms of overall improvement to soil health and productivity. Additionally, promoting soil erosion is detrimental and contrary to the goals of enhancing soil quality and management. Hence, the focus on improving both structure and nutrient content captures the essence of what soil amendments aim to achieve.