Over time, the organic matter content of turf soils is gradually depleted.

Over time, the organic matter content of turf soils is gradually depleted.

• A. True
• B. Sometimes
• C. False
• D. Never

Answer: (A)

In turf soils, organic matter changes with the balance of inputs and losses. Plants, roots, and microbial byproducts continually add organic matter, while this material is lost through decomposition, mineralization, erosion, and leaching. In many turf systems, clippings and residues are removed rather than returned to the soil, and the thatch layer can also decompose faster than new residue is added. Without deliberate inputs—such as leaving clippings on, topdressing with compost, or applying organic amendments—the net result is a gradual decrease in soil organic matter over time. This decline affects soil structure, water-holding capacity, and nutrient retention, which is why maintaining or rebuilding organic matter is a key management goal. If clippings are kept on or organic inputs are routinely added, organic matter can stay stable or even increase, but in typical maintenance practices it tends to deplete.