Forests & Forest Policy

• Capillary Water Potential:
• Capillary rise of water in soil pores or glass tubes occurs against gravity due to surface tension and adhesive forces.
• Water held in the capillary meniscus above a free water table is under hydrostatic suction/tension, existing at sub-atmospheric pressure characterized by a negative pressure potential (matric potential, $\psi_p \lt 0$). (Correct answer: Option 2)

• Temperate and Subtropical Forest Species in the Himalayas:
• Moist Temperate Forest (Group 12): Characterized by high-value conifers such as Cedrus deodara (Deodar), Abies pindrow, and Picea smithiana $\rightarrow$ (III)
• Subtropical Pine Forest (Group 9): Dominated by chir pine (Pinus roxburghii) and banj oak (Quercus incana / Q. leucotrichophora) $\rightarrow$ (I)
• Dry Temperate Forest (Group 13): Found in inner arid Himalayan valleys, dominated by neoza pine (Pinus gerardiana) and pencil cedar (Juniperus macropoda) $\rightarrow$ (IV)
• Alpine Forest (Group 15/16): High-altitude timberline woodlands characterized by Himalayan birch (Betula utilis) and Populus ciliata $\rightarrow$ (II)
• Systematic Match: (A)-(III), (B)-(I), (C)-(IV), (D)-(II) corresponds to Option 4.

Correct option: (4) (A) - (Il), (B) - (I), (C)- (Y), (D) - (II)

• Plant Population Calculation in Silviculture:

$$\text{Plant Population} = \frac{\text{Total Plantation Area}}{\text{Spacing per Plant}}$$

• Parameters:
• Area = $10\text{ hectares} = 100,000\text{ m}^2$
• Rectangular planting geometry: $2.5\text{ m} \times 1.25\text{ m} = 3.125\text{ m}^2\text{ per plant}$

$$\text{Total Seedlings} = \frac{100,000\text{ m}^2}{3.125\text{ m}^2} = 32,000\text{ plants}$$

• Conclusion: A total of 32,000 plants are required for the 10-hectare plantation. (Correct answer: Option 3)