Step 1: Understanding the Question:
This question tests knowledge of soil and water conservation practices.
Step 2: Detailed Explanation:
Mulching (C) is related to in situ moisture conservation.
Mulching involves covering the soil surface with crop residues or other materials.
It reduces evaporation, conserves soil moisture, and moderates soil temperature.
Other options:
- Fertigation (A): Application of fertilizers through irrigation.
- Weeding (B): Removal of weeds (indirectly conserves moisture).
- Seeding (D): Planting of seeds.
Thus, mulching is directly related to in situ moisture conservation.
Step 3: Final Answer:
Thus, mulching is related to in situ moisture conservation, which corresponds to option (C).
[0.5cm]