LY/T 1269-1999
森林植物与森林枯枝落叶层全氮的测定
Determination of total nitrogen in forest plant and forest floor
1999-07-15
LY/T 1271-1999
森林植物与森林枯枝落叶层氮、磷、钾、钠、钙、镁的测定
Determination of total nitrogen, phosphorus, potassium, sodium, calcium, magnesium in forest soil
1999-07-15
LY/T 1228-2015
森林土壤氮的测定
Nitrogen determination methods of forest soils
2015-10-19
LY/T 1255-1999
森林土壤全硫的测定
Determination of total sulphur in forest soil
1999-07-15
LY/T 1254-1999
森林土壤全钾、全钠的测定
Determination of total potassium and total sodium in forest soil
1999-07-15
LY/T 1241-1999
森林土壤水解性总酸度的测定
Determination of hydrolytic total acidity in forest soil
1999-07-15
LY/T 1244-1999
森林土壤交换性盐基总量的测定
Determination of total exchangeable base in forest soil
1999-07-15
BS ISO 20620-2021
Fertilizers and soil conditioners. Determination of total nitrogen by combustion
肥料和土壤调理剂 燃烧法测定总氮
2021-10-29
ISO 20620-2021
Fertilizers and soil conditioners — Determination of total nitrogen by combustion
肥料和土壤改良剂.燃烧法测定总氮
2021-09-30
LY/T 1237-1999
森林土壤有机质的测定及碳氮比的计算
Determination of organic matter in forest soil and calculation carbon-nitrogen ratio
1999-07-15
UNE 77318-2001
Soil quality. Determination of total nitrogen. Modified Kjeldahl method.
土壤质量 总氮的测定 改良凯氏定氮法
2001-09-30
KS I ISO 11261(2018 Confirm)
토양의 질－총질소 함량 측정방법 (수정된 켈달법)
土壤质量总氮的测定改良凯氏定氮法
2008-11-10
HJ 717-2014
土壤质量 全氮的测定 凯氏法
Soil quality-Determination of total nitrogen-Modified Kjeldahl method
2014-11-27
KS I ISO 11261(2021 Confirm)
토양의 질－총질소 함량 측정방법 (수정된 켈달법)
土壤质量总氮的测定改良凯氏定氮法
2008-11-10
ISO 11261-1995
Soil quality — Determination of total nitrogen — Modified Kjeldahl method
土壤质量——总氮&mdash的测定；改良凯氏定氮法
1995-03-09
UNE 77306-1999
SOIL QUALITY. DETERMINATION OF NITRATE NITROGEN, AMMONIUM NITROGEN AND TOTAL SOLUBLE NITROGEN IN AIR-DRY SOIL USING CALCIUM CHLORIDE SOLUTION AS EXTRACTANT.
土壤质量 以氯化钙溶液为萃取剂测定风干土壤中的硝态氮、铵态氮和可溶性总氮
1999-05-26
KS I ISO 14255(2019 Confirm)
토양의 질－공기 건조 토양에서 염화칼슘용액으로 추출한 질산성 질소, 암모니아성 질소 및 총 가용성 질소 측정 방법
土壤质量用氯化钙溶液作萃取剂测定风干土壤中硝态氮、铵态氮和总可溶性氮
2009-12-18
KS I ISO 14255(2023 Confirm)
토양의 질－공기 건조 토양에서 염화칼슘용액으로 추출한 질산성 질소, 암모니아성 질소 및 총 가용성 질소 측정 방법
土壤质量.用氯化钙溶液作萃取剂测定空气干燥土壤中的硝酸盐氮、铵态氮和总可溶性氮
2009-12-18
ISO 14255-1998
Soil quality — Determination of nitrate nitrogen, ammonium nitrogen and total soluble nitrogen in air-dry soils using calcium chloride solution as extractant
土壤质量——氯化钙溶液萃取法测定风干土壤中硝态氮、铵态氮和可溶性总氮
1998-04-23
NY/T 53-1987
土壤全氮测定法(半微量开氏法)
Method for the determination of soil total nitrogen(Semi-micro Kjeldahl method)
1987-01-03