The purpose of this investigation was to determine what effects different pH levels, more specifically pH 3, 5, 7 and 9 have on the rate of growth of plants.

The first 200 words of this essay...

1.0 Abstract

The purpose of this investigation was to determine what effects different pH levels, more specifically pH 3, 5, 7 and 9 have on the rate of growth of plants. It was hypothesised that if the pH is neutral, the growth of the plant will increase because the maximum availability of primary nutrients required for plant growth is greatest at a pH value between 7 and 9. Consequently if the pH is acidic then the growth of the plant will decrease because availability of primary nutrients required for plant growth will be less at a pH value between 1 and 4. An experiment was designed to determine what pH had the most positive effect on the rate of plant growth. It was found that pH 7 caused the largest rate of growth for the plants, with pH 9 following closely behind. Therefore the optimum pH for plants was in fact a pH of 7-9, however, in particular 7.

2.0 Aim

To investigate the effect of varying levels of pH on the growth of broad bean plants, thus determining the differences in growth between broad bean plants with higher pH levels and lower pH levels.