Question:
The "C- Grade" thinning is used to prepare the following table
The "C- Grade" thinning is used to prepare the following table
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Standard Yield Tables in Indian forestry are based on stands subjected to "C-Grade" ordinary thinning. This standard ensures consistent comparison of yield across sites.
Updated On: Jul 21, 2026
- Volume table
- Yield table
- Stand table
- Tariff table
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
Yield tables are forestry tables that show the expected volume, basal area, number of trees, and other stand parameters per unit area at different ages for a specific species, site quality, and management regime.
Step 2: Detailed Explanation:
Let us analyze why "C-Grade" thinning is associated with yield tables:
- In India, standard and regional yield tables are constructed using data collected from long-term sample plots.
- To ensure consistent data collection, these sample plots must be subjected to a standardized thinning regime.
- C-Grade ordinary thinning (which represents a moderate thinning that removes dominated, suppressed, and some co-dominant trees) is the standard thinning regime used across Indian forestry research to manage sample plots.
- The growth data collected from these C-grade thinned plots are used to construct standard Yield tables.
Let us evaluate the alternative choices:
- Volume table: Predicts the volume of individual trees based on variables like DBH and height, without considering stand-level thinning or age.
- Stand table: Shows the distribution of the number of trees by diameter classes at a specific point in time.
- Tariff table: A localized volume table used to estimate volume based on DBH, without requiring height measurements.
Thus, C-grade thinning data are used to construct yield tables.
Step 3: Final Answer:
The "C-Grade" thinning is used to prepare the Yield table.
Yield tables are forestry tables that show the expected volume, basal area, number of trees, and other stand parameters per unit area at different ages for a specific species, site quality, and management regime.
Step 2: Detailed Explanation:
Let us analyze why "C-Grade" thinning is associated with yield tables:
- In India, standard and regional yield tables are constructed using data collected from long-term sample plots.
- To ensure consistent data collection, these sample plots must be subjected to a standardized thinning regime.
- C-Grade ordinary thinning (which represents a moderate thinning that removes dominated, suppressed, and some co-dominant trees) is the standard thinning regime used across Indian forestry research to manage sample plots.
- The growth data collected from these C-grade thinned plots are used to construct standard Yield tables.
Let us evaluate the alternative choices:
- Volume table: Predicts the volume of individual trees based on variables like DBH and height, without considering stand-level thinning or age.
- Stand table: Shows the distribution of the number of trees by diameter classes at a specific point in time.
- Tariff table: A localized volume table used to estimate volume based on DBH, without requiring height measurements.
Thus, C-grade thinning data are used to construct yield tables.
Step 3: Final Answer:
The "C-Grade" thinning is used to prepare the Yield table.
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