Worm and Anit-worm Tanks: the Final Post

Here are the final pictures of the worm-tank investigation.

This is the worm tank:

This is the anti-worm tank:

Questions:

1. What differences can be easily seen between the two tanks?

2. Is this the result you expected?

Here are the results of the changes in measurements:

Worm tank before – Total = 15cm; leaf layer = 25cm; compost layer = 17cm; soil layer = 5cm.

Worm tank after – Total = 15cm; leaf layer = 15m; compost layer = 9.5 cm; soil layer = 5.3cm.

Anti-worm before: Total = 26cm; leaf layer = 26cm; compost layer = 19cm; soil layer = 5cm.

Anti-worm after: Total = 19cm; leaf layer = 19cm; compost layer = 15cm; soil layer = 5cm.

Or, if you’re more visual, here are the results as a graph: (click for full size)

More questions:

3. Why did the soil layer get bigger in the worm tank but not in the anti-worm tank?

4. In the worm tank, why did the compost layer get much smaller, but the soil layer only got slightly bigger?

5. Why do you think the leaf layer remained much the same in both tanks (why didn’t it change much)?

6. Even though there were no worms in the anti-worm tank, the compost layer still got a bit smaller. Can you suggest a reason for this?

~ by bisdragonsscience on April 27, 2008.