To determine which soil sample has a texture that is high in sand, we need to analyze the descriptions given for each soil sample:
1. Sample A: This sample has the smallest particle size and water doesn't drain well. Small particles typically correspond to clay or silt, which indicates a lack of sand.
2. Sample B: This sample has medium particle size and holds water well. This description suggests a balanced mixture of sand, silt, and clay, corresponding to loam soil, but does not indicate a high sand content.
3. Sample C: This sample has coarse particles and loose soil, with water draining quickly. Coarse particles are characteristic of sand. Sand has larger particles compared to silt and clay, and soil with high sand content tends to be loose and allows for rapid water drainage.
4. Sample D: This sample has a mixture of particle sizes and contains humus. While it may have some sand, the mixture of different particle sizes and the presence of humus suggest a more complex soil composition, not necessarily high in sand.
Based on these descriptions, the soil sample that has a texture high in sand is Sample C.
Therefore, the correct answer is:
Sample C
