Soil chemistry is concerned with the availability of elements for plant uptake as well as the presence in soil of elements and chemical compounds that might be present at levels that are detrimental to plants and soil organisms. Some elements in the soil are nutrients and are essential for plant growth. Other elements are not essential and may be toxic to plants. The availability of elements for plant uptake is affected by soil pH and reactions of the elements with soil particles and organic matter.
Soil chemical fertility is affected by: