Identify the correct statement from among the following :
2021
Identify the correct statement from among the following :
- A.
The proportion of fine particles in sandy soil is relatively higher than in the clayey soil.
- B.
The amount of large and fine particles is about the same in clayey soil.
- C.
The proportion of large particles in loamy soil is relatively higher than in the sandy soil.
- D.
The proportion of fine particles in clayey soil is relatively higher than in the loamy soil.
Show answer & explanation
Correct answer: D
Soil texture is classified by the relative proportion of particles of different sizes present in the soil — sand particles are large and coarse, silt particles are medium-sized, and clay particles are extremely fine. Based on this composition, sandy soil is dominated by large, coarse particles; clayey soil is dominated by very fine, clay-sized particles; and loamy soil is a more even, balanced mixture of sand, silt, and clay.
Applying this to clayey and loamy soil: because clayey soil is overwhelmingly made up of fine clay particles while loamy soil balances a substantial sand component with silt and clay, the share of fine particles in clayey soil is markedly higher than the share of fine particles in loamy soil.
The claim that sandy soil carries a higher proportion of fine particles than clayey soil does not hold, because sandy soil is dominated by large, coarse particles while clayey soil is dominated by fine particles — the reverse of that claim.
The claim that clayey soil has roughly equal amounts of large and fine particles does not hold, because clayey soil is overwhelmingly fine-particled, with only a small coarse fraction.
The claim that loamy soil carries a higher proportion of large particles than sandy soil does not hold, because sandy soil, being dominated by coarse sand, carries a larger proportion of big particles than the more balanced loamy mixture.
Hence, the statement that clayey soil carries a relatively higher proportion of fine particles than loamy soil is the accurate one.