b'Influence of the pH on the availability of minerals to the plant.The image opposite shows the interaction between 11 of the essential plant elements in combination with the pH level of the soil. The thickness of the line indicates the availability of the element. So the thicker the line, the greater the availability. It shows that if the soil pH is not in the correct range - 6.2 to 7.2 for most crops - mineral uptake is inhibited. That does not mean that the mineral is not in the soil, it just means that the pH of the soil is too high or too low for the mineral to be absorbed. Influence of the pH on the availability of minerals to the plant.132'