LY/T 1228-2015
森林土壤氮的测定
Nitrogen determination methods of forest soils
2015-10-19
GB/T 32737-2016
土壤硝态氮的测定 紫外分光光度法
Determination of nitrate nitrogen in soil—Ultraviolet spectrophotometry method
2016-08-29
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 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
DIN 19746
Soil quality - Determination of mineral nitrogen (nitrat and ammonium) in soil profiles (Nmin laboratory method)
土壤质量.土壤剖面中矿质氮（硝酸盐和铵）的测定（Nmin实验室法）
2005-06-01
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 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
DIN ISO 14255
Soil quality - Determination of nitrate nitrogen, ammonium nitrogen and total soluble nitrogen in air-dry soils using calcium chloride solution as extractant (ISO 14255:1998)
土壤质量.用氯化钙溶液作为萃取剂测定风干土壤中的硝酸盐氮、铵态氮和总可溶性氮（ISO 14255-1998）
1998-11-01
NY/T 1116-2014
肥料 硝态氮、铵态氮、酰胺态氮含量的测定
Fertiliaers-Determination of nitrate nitrogen,ammonium nitrogen,amide nitrogen contents
2014-03-24
LY/T 1219-1999
森林土壤温度的测定
Determination of forest soil temperature
1999-07-15
LY/T 1223-1999
森林土壤坚实度的测定
Determination of forest soil hardness
1999-07-15
LY/T 1224-1999
森林土壤土粒密度的测定
Determination of soil particle density in forest soil
1999-07-15
SL 84-1994
硝酸盐氮的测定(紫外分光光度法)
Determination of nitrogen (nitrate) (Uitraviolet spectrophometric method)
1995-05-01
GOST 27753.7-1988
Грунты тепличные. Методы определения нитратного азота
温室法测定硝酸盐氮
LY/T 1213-1999
森林土壤含水量的测定
Determination of forest soil water content
1999-07-15
LY/T 1266-1999
森林土壤有效硅的测定
Determination of available silica in forest soil
1999-07-15
LY/T 1214-1999
森林土壤土水势的测定
Determination of forest soil water potential
1999-07-15