Discussion of results and our conclusion

The results from Experiment 1 and Experiment 2 both show that the bean grew best when it was in normal water. Over the five weeks the bean that was in normal water in Experiment 1 grew to 24 cms and the bean that was in normal water in Experiment 2 grew to 18cms.
Our hypothesis was therefore correct as we predicted that the broad beans would grow most successfully when in normal water.

The findings from Experiment 1 and 2 both concur that the bean did not grow when in salt water. The experiement therefore reveals that broad beans are not adapted to living in a salt water environment. It appears that the salt upsets the normal workings of the bean causing it to die.

The findings from Experiment 1 show that the bean did grow whilst it was in sugared water, however, it did not grow as successfully as when it was in normal water. Over the five weeks the bean in Experiement 1 that was in sugared water only grew to the height of 7cms, whereas the bean that was in normal water grew to 24 cms.
The results from Experiment 2 differ to those found in Experiment 1 as the bean in Experiment 2 did not grow at all when it was in sugared water.
It would thus seem that sugar, similarly to salt, affects the normal levels in the plant and has has negative effects on generating bean growth. However, as the bean in Experiment 1 was able to grow when in sugared water it implies that sugared water is not as harmful to the broad bean as salt water is.