Which term refers to the roots that are mostly located in the upper 12 inches of soil?

The term that refers to roots primarily found in the upper 12 inches of soil is "absorbing roots." These roots play a crucial role in the uptake of water and nutrients from the soil, which are essential for the tree or plant's growth and overall health.

Absorbing roots, generally found in many tree species, are thin and have a larger surface area, allowing them to efficiently gather moisture and nutrients near the soil surface where organic matter is often concentrated. This upper layer of soil is typically richer in nutrients and microorganisms that facilitate nutrient absorption.

In contrast, other types of roots, such as deep roots, are more important for stability and accessing water in deeper soil layers, while taproots prioritize anchoring the plant and may penetrate deeper into the soil. Fibrous roots create a dense network that can help prevent soil erosion but do not specifically refer to roots located within the top 12 inches. Understanding the function and placement of absorbing roots is essential for effective tree care and management practices, particularly in determining how to properly water and fertilize trees.