Step 1: Understanding the Question:
This question tests knowledge of seed storage conditions for temperate species.
Step 2: Detailed Explanation:
Temperate tree seeds (orthodox seeds) require low moisture content for storage.
The recommended moisture content is 5-10%.
This prevents seed deterioration and maintains viability.
35-40% (A): Too high for orthodox seeds.
40-50% (B): Too high.
15-30% (C): Higher than recommended.
Thus, the correct answer is 5-10%.
Step 3: Final Answer:
Thus, the recommended moisture content for storing temperate species seeds is 5-10%, which corresponds to option (D).
[0.5cm]