Soil Nitrogen to Phosphorus Ratio

Soil Nitrogen to Phosphorus Ratio, Total:71 items.

The international standard classification for "Soil Nitrogen to Phosphorus Ratio" includes: Farming and forestry , Soil quality and pedology in general , Soil quality. Pedology , Fertilizers .

The Chinese standard classification for "Soil Nitrogen to Phosphorus Ratio" includes: Soil and fertilizer in general , Basic standards and general methods , Water and soil conservation , Chemical fertilizer and chemical soil conditioner .

Professional Standard - Agriculture

NY/T 1121.7-2014 Soil Testing－Part7:Method for determination of avalible phosphorus in soil
NY/T 1121.24-2012 Soil Testing - Part 24: Determination of Total Nitrogen in Soil - Automatic Kjeldahl Apparatus Method
NY/T 30-1986 Determination of rare earth oxide content in soil - Chlorophonazo - P - Hippuric acid photometric method
NY/T 1121.7-2006 Soil TestingPart 7: Method for determination of avalible phosphorus in acid soil
NY/T 1849-2010 Method for determination of ammonium nitrogen,available phosphorus and rapidly-available potassium in acid soil—Universal extract-colorimetric method
NY/T 88-1988 Method for determination of soil total phosphorus
NY/T 1848-2010 Method for determination of ammonium nitrogen,available phosphorus and rapidly-available potassium in neutrality or calcareous soil—Universal extract-colorimetric method

Group Standards of the People's Republic of China

T/NAIA 012-2020 Determination of Soil Phosphatase Activity by Colorimetric Method of Disodium Phenyl Phosphate
T/SDAS 647-2023 Soybean Lecithin Soil Conditioner
T/CPCIF 0308-2023 Preparation of soil conditioner from phosphogypsum
T/NAIA 009-2020 Determination of soil microbial biomass nitrogen
T/CPFIA 0009-2023 Phosphogypsum soil conditioner

Liaoning Provincial Standard of the People's Republic of China

DB21/T 3950-2024 Technical regulations for regulating nitrogen and phosphorus nutrient leaching loss in facility soils

Shanxi Provincial Standard of the People's Republic of China

DB14/T 2599-2022 Technical regulations for soil nitrogen and phosphorus summer fill crop control in vegetable greenhouses

Professional Standard - Forestry

LY/T 1233-1999 Determination of available phosphorus in forest soil
LY/T 1232-1999 Determination of total phosphorus in forest soil
LY/T 1237-1999 Determination of organic matter in forest soil and calculation carbon-nitrogen ratio
LY/T 1232-2015 Phosphorus determination methods of forest soils
LY/T 1228-1999 Determination of total nitrogen in forest soil
LY/T 1228-2015 Nitrogen determination methods of forest soils
LY/T 1231-1999 Determination of ammonium nitrogen in forest soil
LY/T 1230-1999 Determination of nitrate nitrogen in forest soil
LY/T 1229-1999 Determination of hydrolyzable nitrogen in forest soil

General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China

GB 9837-1988 Method for determination of soil total phosphorus
GB/T 42485-2023 Soil quality—Determination of nitrate, nitrite and ammonium in soils—Extraction with potassium chloride solution and determination with manual method
GB/T 42490-2023 Soil quality—Determination of total content and isotope ratio of organic carbon and nitrogen of soil and biological samples—Stable isotope ratio mass spectrometry
GB 6260-1986 Determination of rare earth oxide content in soil--Chlorophosphonazo-p-hippuric acid photometric method
GB/T 42488-2023 Soil quality—Determination of nitrogen-15 abundance of inorganic nitrogen in soil—Stable isotope ratio mass spectrometry
GB/T 42487-2023 Soil quality—Determination of nitrate, nitrite and ammonium in soils—Extraction with potassium chloride solution and determination using automated method with segmented flow analysis

Hebei Provincial Standard of the People's Republic of China

DB13/T 843-2007 Soil Available Nitrogen Determination

Xinjiang Provincial Standard of the People's Republic of China

DB65/T 602.4-2001 The determinanation of nitrate nitrogen in soil
DB65/T 602.2-2001 The determinanation of hydrolyzable nitrogen in soil
DB65/T 602.5-2001 The determinanation of available phosphous in soil
DB65/T 602.3-2001 The determinanation of ammonium nitrogen in soil

Sichuan Provincial Standard of the People's Republic of China

DB51/T 1875-2014 Determination of soil alkaline nitrogen

Tianjin Provincial Standard of the People's Republic of China

DB12/T 1270-2023 Determination of cracked nitrogen in soil

Professional Standard - Chemical Industry

HG/T 4219-2011 Soil conditioner Phosphogypsum

Hubei Provincial Standard of the People's Republic of China

DB42/T 281-2004 Soil Conditioner - Phosphogypsum
DB42/ 281-2004 Soil Conditioner - Phosphogypsum

Taiwan Provincial Standard of the People's Republic of China

CNS 5090-1988 Method of Test for Specific Gravity of Soils

Ningxia Provincial Standard of the People's Republic of China

DB64/T 1734-2020 Soil Hydrolyzable Nitrogen Determination Kjeldahl Method

National Standardisation Body (ASRO)

STAS 7184/14-1979 SOILS Determination of total phosphor content
STAS 7184/2-1985 SOILS Nitrogen content determination
STAS 1914-1970 FOUNDATION SOILS Determination of density and of specific gravity of soils

Bureau of Indian Standards

IS 14684-1999 Determination of Nitrogen and Nitrogenous Compounds in Soils

Deutsche Vereinigung für Wasserwirtschaft, Abwasser und Abfall e. V. (DWA)

DWA-M 920-3 E:2016-07 Sofa function evaluates the role of soil in nutrient cycling (nitrogen, phosphorus, potassium, calcium, magnesium, sulfur)
DWA-M 920-3:2018-12 Soil functional requirements Part 3: Functions of nutrient cycling (nitrogen, phosphorus, potassium, calcium, magnesium, sulfur) in agricultural land

Portuguese Institute of Quality

NP 83-1956 specific gravity of soil particles

Gosstandart of Russia

GOST R 58596-2019 Soils. Methods for determination of total nitrogen
GOST R 53219-2008 Soil quality. Determination of nitrogen in air-dry soils using calcium chloride solution
GOST 26107-1984 Soils. Methods for determination of total nitrogen

American Association of State Highway and Transportation Officials

AASHTO T 100-2006 Standard Method of Test for Specific Gravity of Soils

Korean Agency for Technology and Standards (KATS)

KS I ISO 14255-2023 Soil quality－Determination of nitrate nitrogen, ammonium nitrogen and total soluble nitrogen in air-dry soils using calcium chloride solution as extractant
KS I ISO 14255:2009 Soil quality－Determination of nitrate nitrogen, ammonium nitrogen and total soluble nitrogen in air-dry soils using calcium chloride solution as extractant
KS I ISO 14255-2009(2019) Soil quality－Determination of nitrate nitrogen, ammonium nitrogen and total soluble nitrogen in air-dry soils using calcium chloride solution as extractant
KS I ISO 11261-2008(2021) Soil quality－Determination of total nitrogen－Modified Kjeldahl method
KS I ISO 11261-2008(2018) Soil quality－Determination of total nitrogen－Modified Kjeldahl method
KS I ISO 11261-2021 Soil quality－Determination of total nitrogen－Modified Kjeldahl method

GCC Standardization Organization

GSO ISO 14255:2013 Soil quality - Determination of nitrate nitrogen, ammonium nitrogen and total soluble nitrogen in air-dry soils using calcium chloride solution as extractant
GSO ISO 11261:2015 Soil quality -- Determination of total nitrogen -- Modified Kjeldahl method

The Directorate General of Specifications and Metrology (DGSM)

OS GSO ISO 14255:2013 Soil quality - Determination of nitrate nitrogen, ammonium nitrogen and total soluble nitrogen in air-dry soils using calcium chloride solution as extractant
OS GSO ISO 11261:2015 Soil quality -- Determination of total nitrogen -- Modified Kjeldahl method

Association Francaise de Normalisation

NF ISO 11261:1995 Soil quality - Total nitrogen dosage - Modified Kjeldahl method

International Organization for Standardization (ISO)

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

Indonesia Standards

SNI 13-4721-1998 Methods for determination of total nitrogen content in soils
SNI 1964-2008 Testing method for specific grafity of soils

Spanish Association for Standardization (UNE)

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.

Swedish Institute for Standards

SS-ISO 14255:1999 Soil quality - Determination of nitrate nitrogen, ammonium nitrogen and total soluble nitrogen in air-dry soils using calcium chloride solution as extractant
SS-ISO 11261:1996 Soil quality - Determination of total nitrogen - Modified Kjeldahl method

German Institute for Standardization

DIN ISO 14255:1998-11 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)

Kingdom of Bahrain Testing and Metrology Directorate

BH GSO ISO 11261:2017 Soil quality -- Determination of total nitrogen -- Modified Kjeldahl method

Others: Soil Total Nitrogen and Total Phosphorus,Soil total phosphorus and total nitrogen,Total Phosphorus and Total Nitrogen in Soil,Soil total phosphorus and total nitrogen,Soil Total Nitrogen and Total Phosphorus,Total nitrogen, total phosphorus in soil,Soil carbon to nitrogen ratio,Determination of total nitrogen and total phosphorus in soil,Soil Total Nitrogen and Total Phosphorus,Soil total nitrogen, total phosphorus,Soil carbon to nitrogen ratio,Total Phosphorus and Total Nitrogen in Soil,Soil total phosphorus, total nitrogen,Soil NPK,Nitrogen to Phosphorus Ratio Analysis,Nitrogen to phosphorus ratio,Soil carbon and nitrogen ratio meter,Soil Nitrogen to Phosphorus Ratio,Soil total phosphorus and total nitrogen