"Kvælstofcyklus" . . "Cycle de l'azote." . . "Virkninger" . . "Pestizid." . . "Növényvédőszerek." . . "Pesticides." . . "Pesticides" . . . . . . . . . . . . . . . . . . . . . . "Handbuch" . . . . . . . . . "Pesticides and nitrogen cycle" . . "Pesticides and nitrogen cycle"@en . . . . . . . "Pesticider" . . "Soil Microbiology." . . "Kvælstofbinding" . . "Aufsatzsammlung." . . "Nitrogen fixation" . . "Stickstoffkreislauf." . . . . "Nitrogen metabolism." . . "Nitrogen metabolism" . "Denitrification" . . "Pesticides Aspect de l'environnement." . . "Effects" . . "Denitrifikation" . .