土壤中总氮含量一般为多少 标准查询与下载

SNI 13-4721-1998 土壤中总氮含量的测定

Methods for determination of total nitrogen content in soils

TCVN 7373-2004 土质.越南土壤中总氮含量的指数值

Soils quality.Index values of total nitrogen content in the soils of Vietnam

GOST 26107-1984 土壤.含氮总量的测量方法

Soils. Methods for determination of total nitrogen

KS I ISO 14255-2023 土壤质量 氯化钙溶液为萃取剂测定风干土壤中硝态氮、铵态氮和可溶性总氮

Soil quality－Determination of nitrate nitrogen, ammonium nitrogen and total soluble nitrogen in air-dry soils using calcium chloride solution as extractant

GSO ISO 14255:2013 土壤质量 以氯化钙溶液为萃取剂测定风干土壤中硝态氮、铵态氮和总溶解氮

  Scope is not provided for this standard

Soil quality - Determination of nitrate nitrogen, ammonium nitrogen and total soluble nitrogen in air-dry soils using calcium chloride solution as extractant

UNE 77306:1999 土壤质量 以氯化钙溶液为萃取剂测定风干土壤中硝态氮、铵态氮和总可溶性氮

SOIL QUALITY. DETERMINATION OF NITRATE NITROGEN, AMMONIUM NITROGEN AND TOTAL SOLUBLE NITROGEN IN AIR-DRY SOIL USING CALCIUM CHLORIDE SOLUTION AS EXTRACTANT.

OS GSO ISO 14255:2013 土壤质量 以氯化钙溶液为萃取剂测定风干土壤中硝态氮、铵态氮和可溶性总氮

Soil quality - Determination of nitrate nitrogen, ammonium nitrogen and total soluble nitrogen in air-dry soils using calcium chloride solution as extractant

NF X31-115:2001 土壤质量.为测定新鲜土壤中矿物氮含量对土壤进行的取样和样品的储存

Soil quality - Sampling and storage of soil samples in view of determination of mineral nitrogen on fresh soil.

DIN ISO 14255:1998-11 土壤质量 用氯化钙溶液作为萃取剂测定风干土壤中硝态氮、铵态氮和总可溶性氮

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)

DIN ISO 14255:1998 土壤质量.使用氯化钙溶液作萃取剂测定干空气土壤中的硝态氮,氮铵和可溶解氮总含量

The document describes procedures for determination of the soluble nitrogen fractions nitrate, nitrite and ammonium and organic nitrogen in soils

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)

NF X31-111*NF ISO 11261:1995 土壤质量.氮总含量的测定.改进的凯氏测氮法(kjeldahl)

Soil quality. Determination of total nitrogen. Modified kjeldahl method.

GOST R 53219-2008 土壤质量.用氯化钙溶液测定风干土壤中氮含量

Soil quality. Determination of nitrogen in air-dry soils using calcium chloride solution

STAS 7184/2-1985 土壤氮素含量测定

Prezentul standard stabile?te metodele de determinare a con?inutului de azot organic ?i azot amoniacal din sol ?i anume : — metoda Kjeldahl

SOILS Nitrogen content determination

NF X31-418*NF ISO 13878:1998 土壤质量.干燃法测定氮总含量(元素分析)

Soil quality. Determination of total nitrogen content by dry combustion ("elemental analysis").

NEN 5754-1992 土壤．土壤中作为烧失量的有机物含量的测定

Deze norm is van toepassing op alle soorten grondmonsters die zijn voorbehandeld volgens NEN 5751. Opmerking Deze methode is toepasbaar voor

Soil - Determination of organic matter content in soil as loss-on-ignition