FORMS OF POTASSIUM IN REGOSOL OF THE STAT E-OF-PARAIBA, BRAZIL

This research was carried out to determine different forms of potassiu m in regosol of the State of Paraiba, Brazil and to establish the poss ible relationships among them. The following parameters were analyzed: exchangeable K, nonexchangeable K, total K, K extracted by Bray 1, po tassium potential and potassium buffering capacity (PBC). High relatio nships were found between the different forms of soil potassium. The n onexchangeable K did not present relationship with potassium potential . The soils studied presented low PBC, indicating possible nutrient lo sses through leaching.