Exchangeable cations (Ca2+, Al3+, Mg2+) were measured after extraction with 1 mol L−1 KCl; K and P were extracted by Mehlich-1;H + Al was extracted with 0.5 mol L−1 Ca(OAc)2 at pH 7.0
Exchangeable cations (Ca2+, Al3+, Mg2+) were measured afterextraction with 1 mol L−1 KCl; K and P were extracted by Mehlich-1;H + Al was extracted with 0.5 mol L−1 Ca(OAc)2 at pH 7.0