This standard specifies a method for the determination of ammonium nitrogen in forest soil using the magnesium oxide leaching-diffusion method. This standard applies to the determination of ammonium nitrogen in forest soil.
LY/T 1231-1999 history
2016LY/T 1228-2015 Determination of forest soil nitrogen
1999LY/T 1231-1999 Determination of ammonium nitrogen in forest soil
LY/T 1231-1999 Determination of ammonium nitrogen in forest soil was changed to LY/T 1228-2015 Determination of forest soil nitrogen.