Which Indian soil term is correctly associated with course, basin or associated feature “it forms largely from weathering of ancient crystalline rocks”, and also with “it is generally deficient in nitrogen, phosphorus and humus”?

Correct Answer: Option C — Red and Yellow Soil. Red and Yellow Soil is correctly identified as it forms largely from weathering of ancient crystalline rocks. Red and Yellow Soil is also associated with it is generally deficient in nitrogen, phosphorus and humus. Another identifying fact about Red and Yellow Soil is that it forms largely from weathering of ancient crystalline rocks. A further exam-relevant fact about Red and Yellow Soil is that it is generally deficient in nitrogen, phosphorus and humus. Why the other options are incorrect: • Option A — Laterite Soil: Laterite Soil is it is often rich in iron and aluminium oxides but poor in humus. It is incorrect here because Laterite Soil is instead associated with with manuring it can support tea, coffee, rubber and cashew. • Option B — Arid Soil: Arid Soil is low humus and moisture are common limitations. It is incorrect here because Arid Soil is instead associated with irrigation can make suitable areas productive but may increase salinity if poorly managed. • Option D — Forest and Mountain Soil: Forest and Mountain Soil is texture and humus content change markedly with altitude and slope. It is incorrect here because Forest and Mountain Soil is instead associated with terraced and valley areas may support tea, spices and temperate fruits. Exam Takeaway: Connect Red and Yellow Soil with “it forms largely from weathering of ancient crystalline rocks” and “it is generally deficient in nitrogen, phosphorus and humus” for revision.