Ala. Code § 2-24-1

Recognized soil-testing practices are the most effective means by which fertilizer and lime needs of fields, pastures and gardens can be determined for the growth of certain crops, plants and grasses. It is a means of providing the latest information available from research and experimental sources for fertilizers and limes needed for agricultural production. Therefore, the purpose of this chapter is to authorize the approval and certification of agricultural soil-testing laboratories which follow recommended uniform methods, procedures and standards for the soil and climatic conditions which prevail in the State of Alabama.