Weblinks:
World Soil Activity FAO
BIOFECTOR & Bio-Effectors in WikipediaAssociation for Microorganisms in AgricultureChemical & Biological Technologies in AgricultureEuropean Union: BIOFECTOR InformationFaculty Agrobiology, F & N R CULS Prague
Deutsche Phytomedizinische Gesellschaftmadora GmbH BIOFECTOR Disseminationplantnutrition university hohenheimSciencia Agriculturae Bohemica Prague