What does the term "inorganic" refer to in soil amendments?

The term "inorganic" in the context of soil amendments refers specifically to materials derived from non-living sources. Inorganic amendments include a variety of materials such as minerals and synthetic products that enhance soil properties and fertility without the involvement of organic matter, which is derived from living organisms.

These inorganic amendments can provide essential nutrients to the soil and plants in forms that are readily available for uptake. For example, substances like lime, gypsum, or rock phosphate fall under this category. They can be used to adjust pH, improve drainage, or provide specific nutrients that plants need for healthy growth.

The other options pertain to organic materials or amendments linked to living sources, such as those derived from decomposed plant or animal matter, which contrast with inorganic materials. Understanding this distinction is crucial for effectively managing soil health and fertility in landscape settings.