Biotic manipulation effects on soil carbohydrates and microbial biomass in a cultivated soil

arable soils arthropoda biomasa biomass biomasse carbohidratos carbohydrates carbon carbone carbono champignon cycling earthworms eua fongicide fungi fungicidas fungicides glucide hongos insecticidas insecticide insecticides lumbricidae manejo del suelo microorganisme microorganismos microorganisms mise en valeur du sol nutrientes nutrients organic matter racine roots soil soil management sol sol arable substance nutritive suelo suelos cultivables usa