Evaluación de cuatro métodos para la extracción de microelementos en suelos del Valle del Cauca

To evaluate available micronutrients in soils from north and central areas of Cauca Valley, sampies of surface horizons of 30 soils were collected. Iron, Cu, Mn and Zn were extracted with: a) EDTA 0.01M + NaHCO3 0.5M; b) HCI 0.05N + H2SO4 0.025N; c) DTPA 0.05M, and d) HCI 0.1N. Available Boron (B) w...