What are soil amendments?

Soil amendments are materials added to the soil to enhance its structure, fertility, and drainage capabilities. This process is vital for optimal plant growth, as it helps improve the physical, chemical, and biological properties of the soil. By incorporating soil amendments, such as compost, peat moss, and various organic materials, gardeners and landscapers can create an environment that promotes healthy root development and nutrient availability.

The correct answer focuses on the broad scope of benefits that soil amendments provide, highlighting their role in improving soil characteristics essential for supporting plant life. These enhancements can lead to better water retention, aeration, and nutrient absorption, contributing to the overall health of the landscape.

Other options provided do not encompass the full definition of soil amendments. For example, while natural fertilizers made from plant material may improve soil fertility, they do not necessarily address aspects like structure and drainage. Additionally, substances used to kill pests in the soil pertain specifically to pest management rather than soil improvement, and pre-planted seedlings relate to propagation rather than amendment practices. Therefore, the key elements of soil amendments are most accurately captured in the first option.