ABSTRACT
Soil fertility is a broad term that refers to the ability of soil to supply nutrients to a crop. The ability to supply nutrients is affected by their amounts in the soil and is governed also by several other chemical, physical, and biological properties. Soil fertility is sometimes referred to as soil quality or soil health. These terms have been used to direct attention that soil fertility not only is related to the chemical factors of the soil but is governed by the physical and biological factors as well. Chemical factors of soil fertility refer to the supply of plant nutrients in the soil with regards to the total supply and to the amounts of the total supply that are available for plant nutrition. Soil acidity is a chemical factor of soil fertility. Soil acidity affects the solubility or availability of plant nutrients and other chemical elements that affect the ability of plants to grow in soils.
