In the process of nitrification, ammonia is first oxidized to nitrite by the bacteria a. Nitrobacter and Nitrococcus b. Nitrosomonas and Nitrococcus c. Nitrosomonas and Nitrobacter d. Thiobacillus and Pseudomonas.
Option B.First step, ammonium ions are oxidised to nitrites. Nitrosomonas are the most important agents of oxidation of ammonia to nitrite in soil. Certain other bacteria are Nitrosococcus , Nitrosolobus ,etc. Second step , oxidation of nitrite to nitrate takes place by Nitrobacter. So the correct option is "Nitrosomonas and Nitrococcus".
