Question

Based on the above chart, which of the following represents loam?

A. 40% sand, 20% clay, 40% silt
B. 20% sand, 70% clay, 10% silt
C. 10% sand, 20% clay, 70% silt
D. 50% sand, 50% clay, 0% silt

Answer 1

The representation of loam on a triangular plot for soil classification is option A. 40% sand, 20% clay, 40% silt, as loam is characterized by a balanced mix of sand, silt, and clay.

Step-by-step explanation:

The triangular plot, or ternary plot, is used by geologists to classify soil or sediment samples based on their proportions of sand, silt, and clay. When plotting a sample's composition on a triangular plot, the three components should add up to 100%.

Based on the soil composition options provided and the typical composition of loam, which is relatively balanced between sand, silt, and clay, the option that represents loam is A. 40% sand, 20% clay, 40% silt. This soil type is known for its optimal balance of particles, making it fertile and an excellent medium for growing plants.