NOVELTY - Reducing nitrous oxide emission from soils, comprises treating a plant growing on the respective soil and/or the locus, where the plant is growing or is intended to grow and/or the seeds from which the plant grows, with at least one fungicide e.g. inhibitors of complex III at quinol oxidation site, inhibitors of complex III at quinone reduction site, inhibitors of complex II, sterol biosynthesis inhibitors, nucleic acid synthesis inhibitors or inhibitors of cell division and cytoskeleton, and at least one ammonium- or urea-containing fertilizer including inorganic or organic fertilizers.    USE - The method is useful for reducing nitrous oxide emission from soils.    ADVANTAGE - The method: is ecological and economical friendly; reduces the impact of modern agriculture on the environment and its atmosphere as well as on global warming; and minimizes loss of nitrogen to the groundwater, and risk of eutrophication of lakes and streams, due to an optimized use of soil nitrogen.    DETAILED DESCRIPTION - Reducing nitrous oxide emission from soils, comprises treating a plant growing on the respective soil and/or the locus, where the plant is growing or is intended to grow and/or the seeds from which the plant grows, with at least one fungicide (A) comprising inhibitors of complex III at quinol oxidation site (e.g. azoxystrobin, enestroburin, dimoxystrobin, pyraclostrobin and trifloxystrobin), inhibitors of complex III at quinone reduction site (cyazofamid or amisulbrom), inhibitors of complex II (e.g. fluxapyroxad, benodanil, bixafen, isopyrazam and sedaxane), other respiration inhibitors (e.g. diflumetorim, dinocap, fluazinam, tecnazene and fentin hydroxide), sterol biosynthesis inhibitors (e.g. azaconazole, bitertanol, myclobutanil, triadimenol and triadimefon), delta 14-reductase inhibitors (aldimorph, dodemorph, dodemorph-acetate, fenpropimorph, tridemorph, fenpropidin, piperalin and spiroxamine), nucleic acid synthesis inhibitors (phenylamides or acyl amino acid fungicides, benalaxyl, kiralaxyl, metalaxyl, metalaxyl-M (mefenoxam), ofurace or oxadixyl), hymexazole, octhilinone, oxolinic acid, bupirimate, inhibitors of cell division and cytoskeleton (e.g. benzimidazoles, thiophanates, carbendazim, fuberidazole and thiabendazole), other cell division inhibitors (diethofencarb, ethaboxam, pencycuron, fluopicolide, zoxamide, metrafenone or pyriofenone), inhibitors of amino acid and protein synthesis, methionine synthesis inhibitors (cyprodinil, mepanipyrim, nitrapyrin or pyrimethanil), protein synthesis inhibitors (e.g. blasticidin-S, kasugamycin, mildiomycin, streptomycin and oxytetracyclin), signal transduction inhibitors, mitogen activated protein kinase/histidine kinase inhibitors (fluoroimid, procymidone, vinclozolin, fenpiclonil or fludioxonil), G-protein inhibitors (quinoxyfen), lipid and membrane synthesis inhibitors (e.g. edifenphos, pyrazophos, dicloran, flumorph and propamocarb), inhibitors with multi-site action (e.g. copper acetate, metam, dichlorophen, iminoctadine and dithianon), inhibitors of glucan synthesis (e.g. validamycin, pyroquilon, tricyclazole, dicyclomet and fenoxanil), plant defense inducers (e.g. isotianil, tiadinil and fosetyl-aluminum) or unknown mode of action (e.g. bronopol, cymoxanil, dazomet, flutianil, tebufloquin, tecloftalam, cyflufenamid, diclomezine, diphenylamine and 2-butoxy-6-iodo-3-propyl chromen-4-one), and at least one ammonium- or urea-containing fertilizer (B) comprising inorganic fertilizer (nitrogen potassium phosphate fertilizer, ammonium nitrate, calcium ammonium nitrate, ammonium sulfate nitrate, ammonium sulfate or ammonium phosphate), organic fertilizer (liquid manure, semi-liquid manure, stable manure and straw manure, worm castings, compost, seaweed and guano), where the application of (A) and (B) is carried out with a time lag of at least 1 day.