Page 106 - Biology - XII

PROJECT - 6
Objective

Measurement of growth in plants.

Materials Required
Arc auxanometer and a potted plant

Procedure
1. Take a healthy potted plant. Tie a string to the growth tip of the plant.

2. Let the string pass over the pulley of the arc auxanometer.
3. Keep the set at a suitable place in the lab for a few days and note the growth. Note the position of
the pointer. (Keep watering the plant regularly.)

Results
1. As the plant grows in height, the pointer shows changes in the scale.
2. With the growth of plant, the pointer indicates the growth.

Scale

Pulley
Pointer

Potted plant

Weight
Pot Stand

Fig. 6.1: Arc auxanometer

Observation Table
Measurement of growth in plant

Reading
S. No. Days Inference
Pointer Actual growth

1. 1st day (24 hrs.)

2. 2nd day (48 hrs.)

3. 4th day

4. 7th day

5. 15th day

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