Texas Plant and Soil Lab

Founded in 1938, Texas Plant and Soil Lab (TPSL) is today one of the world's premier Agricultural Laboratories.

TPSL provides agricultural testing and recommendations for specific crop soil testing, plant leaf and stem testing, water testing, compost testing, humate testing, heavy metals testing, organic testing and more.

TPSL is one of a handful of testing laboratories in the whole world to use the CO2 extraction method, simulating the way plants absorb the nutrients that are available in the soil, as opposed to testing the entire composite of the soil which may not be accessible to the plant.