Method for determination of ammonium nitrogen,available phosphorus and rapidly-available potassium in neutrality or calcareous soil—Universal extract-colorimetric method
标准号:NY/T 1848-2010
Method for determination of ammonium nitrogen,available phosphorus and rapidly-available potassium in neutrality or calcareous soil—Universal extract-colorimetric method
标准号:NY/T 1848-2010