The kinetic constants Kmapp and Vmaxapp of phosphatase activity from a coastal tableland soil grown with orange trees, submitted to different base saturation levels (32.0; 45.0; 64.0 and 76.6%), were determined. These determinations were made in optimum pH values for alkaline and acid phosphatases and in the pH values obtained for each base saturation level. Phosphatase activity has followed Michaelis-Menten kinetics, regardless the soil base saturation levels or pH values used for enzymatic activity evaluation. Increases in the soil bases […]