Nitr.cycle occurs by the process of nitrogen fixation,nitration,ammonification and denitrification.plants absorb nit. From the soil .animales eats them and gets  nit. After the death of animals or their excreta changes into ammonia and ammonium salt into the soil.bacteria eg. Nitrosomonas convert it into the nitrites which changes into nitrates by nitrobacter bact. Plants takes it … Read more