J.M.Bremner运用Conway所提出的微量扩散法成功地測定了土壤中的氨态氮及硝态氮。条件試驗証明氨态氮及硝态氮的平均回收率分別可达99.2%及99.9%。扩散法有很多优点。需要的設备极簡单,所用試剂也都是通常容易获得的,而且試剂的用量 J.M. Bremner using Conway proposed by the micro-diffusion method for the determination of soil ammonia nitrogen and nitrate nitrogen. The experimental results show that the average recoveries of ammonia nitrogen and nitrate nitrogen can reach 99.2% and 99.9% respectively. Diffusion method has many advantages. The equipment needed is extremely simple, the reagents used are also usually readily available, and the amount of reagent