Step 1: Understanding Dibbling.
Dibbling refers to a process in agriculture where seeds are placed in pre-made holes in a seedbed and then covered with soil. This method ensures proper seed placement and encourages better germination.
Step 2: Analysis of options.
- (1) placing seeds in holes made in seedbed and covering them: Correct. This is the definition of dibbling.
- (2) applying fertilizer by hand: Incorrect. This refers to fertilizing, not dibbling.
- (3) removing weeds with the use of a tool: Incorrect. This refers to weeding.
- (4) applying chemicals in powder form: Incorrect. This refers to chemical application, not dibbling.
Step 3: Conclusion.
The correct answer is (1) placing seeds in holes made in seedbed and covering them.
Final Answer:
\[
\boxed{(1) placing seeds in holes made in seedbed and covering them.}
\]