Acidity Versus Alkalinity of Soil
In order for plants to obtain the nutrients they need to survive, these nutrients must be carried into them by being dissolved into the ground water that the plants absorb through their roots.
If a soil has too much acid in it, the nutrients in the soil will be dissolved too quickly, and leached away as the water drains. If a soil is too alkaline, or in other words, if there is not enough acid, then nutrients will not dissolve quickly enough.
Thus, a neutral soil, which is neither too acidic nor too alkaline, is the preferred type of soil for plant life to thrive.