Question

The highest category of soil classification system is

• A. Series
• B. Type
• C. Great groups
• D. Order

Hint:

Soil Taxonomy hierarchy:
Order $\rightarrow$ Suborder $\rightarrow$ Great Group $\rightarrow$ Subgroup $\rightarrow$ Family $\rightarrow$ Series.
Order is the highest category.

Answer 1

The Correct Option is D

Step 1: Understanding the Question:
This question tests knowledge of the USDA Soil Taxonomy classification hierarchy.

Step 2: Detailed Explanation:
The highest category in the soil classification system is Order (D).
The hierarchy in Soil Taxonomy (USDA) is:
Order $\rightarrow$ Suborder $\rightarrow$ Great Group $\rightarrow$ Subgroup $\rightarrow$ Family $\rightarrow$ Series.
Thus, Order is the highest category.
Other options:
- Series (A): The lowest category.
- Type (B): Not a standard category.
- Great groups (C): A lower category.
Thus, Order is the highest category.

Step 3: Final Answer:
Thus, the highest category of soil classification is Order, which corresponds to option (D).
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