Numbers of microorganisms and enzymatic activity in soil polluted by coal ash

acid phosphatase actividad enzimática activité enzymatique alkaline phosphatase analytical methods ashes avenas avoine bacteria carbón cellulolytic microorganisms cendre ceniza champignon charbon coal contaminación contamination crop yield enzyme activity experimentación en contenedor expérimentation en pot fosfatasa alcalina fosfatasa ácida fungi hongos laitue lechugas lettuces micro-organisme cellulolytique microorganismos celulolíticos oats phosphatase acide phosphatase alcaline pot experimentation rendement des cultures rendimiento de cultivos sampling soil soil texture soil types sol suelo technique analytique textura del suelo texture du sol tipos de suelos type de sol técnicas analíticas ureasa urease uréase échantillonnage