Heavy metals content in standard soil plots of the Puszcza Biala forest

analytical methods atomic absorption spectrometry carbon carbone carbono environmental impact forest reserves forest soils heavy metals impact sur l'environnement impacto ambiental metales pesados muestreo normas norme ph del suelo ph du sol poland pologne polonia reservas forestales sampling soil soil ph soil texture soil types sol standards statistical methods suelo suelo forestal technique analytique textura del suelo texture du sol tipos de suelos type de sol