What does darker soil color usually indicate in rangeland soils?

• A. Higher organic matter
• B. More compacted structure
• C. Coarser texture
• D. Lower moisture

Answer: (A)

Dark soil color usually signals higher organic matter content. In rangeland soils, plant residues break down and form humus, which darkens the soil and signals more organic material present. This organic matter improves nutrient storage, water-holding capacity, and soil structure, all of which are beneficial in range environments where moisture and nutrients can be limiting. While moisture, texture, or compaction can influence color in some contexts, the most consistent link in rangeland soils is that darker color reflects greater organic matter.