At pHs below 7, most micronutrients such as copper, zinc, and iron and most toxic elements such as lead, and cadmium are more soluble with the exception of Mo and thus available for plant uptake. Once the pH drops below 5.5, Aluminum becomes more soluble. Al is toxic to microbes and also to plant roots. Some acid-loving plants such as blueberries and some hemp cultivars can take up the aluminum and convert it to nontoxic form. Other plants deal with the toxicity of aluminum by preventing this element from being taken up by the plant roots. At pHs above 7.5, most micronutrients become unavailable. Thus, the plants suffer from micronutrient deficiencies.

pH also affects the amount of microbial activity which occurs in the soil. The higher the soil pH, the more overall microbial activity. Thus, organic matter decomposition happens quicker at higher pHs. At low pHs, the primary organism involved in decomposition is fungi. Why is this important? Because not all fungi is good to a garden. Your plants and flower garden can be quickly eradicated if soil pH levels are not up to scratch.

The soil net ability to hold nutrients and water is higher with increasing pH. This is especially true with soils with high organic matter content and also certain types of clays. The reason is that when the exchangeable acidity is removing, the exchange sites will now be able to absorb other ions. Thus, the caption exchange capacity (CEC) of the soil will vary with pH.

Soil pH also affects the soil structure. Lower pH soils have a tendency to be more disperse. The reason is that hydrogen has a large hydration radius. Dispersion also can occur in high pH soils which contain a significant amount of sodium. Sodium like hydrogen has a large hydration radius. For all of the above reason, knowing the pH of your soil is the single most important soil characteristic in determining what you can grow in your soil. Additionally, soil pH is one of the easiest property of you soil that you can change. Soil pH can be raised by adding various liming materials. Liming is assumed to be intricate when artificial diamonds are being created.