求标准：DIN ISO/TS 14256-1、ISO 10390、ISO 10649、ISO 13878

谁来应助，本人有奖励。而且这是国外标准，你放错地方了。我帮你转过去。

谢谢你~

ISO/TS 14256-1:2003
Soil quality -- Determination of nitrate, nitrite and ammonium in field-moist soils by extraction with potassium chloride solution -- Part 1: Manual method
http://www.doc88.com/p-6611254054958.html
http://www.doc88.com/p-1864638141484.html

HJ 634-2012
ISO/TS 14256-1:2003，MOD
http://kjs.mep.gov.cn/hjbhbz/bzwb/trhj/trjcgfffbz/201203/W020120410334212431419.pdf

ISO 10390:2005
Soil quality -- Determination of pH
http://bbs.myboyan.com/guoji/b267432/

ISO 10694:1995
Soil quality -- Determination of organic and total carbon after dry combustion (elementary analysis)
http://www.doc88.com/p-9909573249865.html
http://www.doc88.com/p-315743008322.html
http://www.doc88.com/p-6971994810512.html
ISO 13878:1998
Soil quality -- Determination of total nitrogen content by dry combustion ("elemental analysis")
http://www.doc88.com/p-9542130699105.html

ISO 13878-1998
ISO TS 14256-1-2003