What is loam primarily composed of?

Loam is primarily composed of decayed plant and animal matter, which contributes to its rich nutrient content and ideal texture for agricultural purposes. This organic material, also known as humus, plays a crucial role in enhancing soil fertility by improving moisture retention and providing essential nutrients that support plant growth.

Loam typically contains a balanced mixture of sand, silt, and clay, which allows for good drainage while retaining sufficient moisture—a characteristic that is highly desirable in soils used for gardening and farming. The presence of decayed organic matter not only aids in feeding plants but also promotes an active ecosystem of microorganisms that further enrich the soil.

In contrast, highly toxic metals, potassium and ammonium, or simply dirt do not accurately define what loam is. While potassium and ammonium can be components of the soil's nutrient profile, they do not determine the primary composition of loam. The notion of "dirt" is a vague term that doesn't capture the agricultural and ecological value that loam possesses.