LY/T 3372-2024 Specification for positioning observation of grassland ecosystem

GB/T 11893-1989 Water quality—Determination of total phosphorus— Ammonium molybdate spectrophotometric method GB/T 11914-1989 Water quality—Determination of the chemical oxygen demand—Dichromate method GB/T 13580.4-1992 Determination of pH value of the wet precipitation—Glass electrode method GB/T 25875-2010 Guideline for segmentating and monitoring the inhabitable area of locust and grasshopper in grassland GB/T 35222-2017 Specifications for surface meteorological observation—Cloud GB/T 35223-2017 Specifications for surface meteorological observation—Meteorological visibility GB/T 35224-2017 Specifications for surface meteorological observation—Weather phenomena GB/T 35225-2017 Specifications for surface meteorological observation—Atmospheric pressure GB/T 35226-2017 Specifications for surface meteorological observation—Air temperature and humidity GB/T 35227-2017 Specifications for surface meteorological observation—Wind direction and wind speed GB/T 35228-2017 Specifications for surface meteorological observation—Precipitation GB/T 35229-2017 Specifications for surface meteorological observation—Snow depth and snow pressure GB/T 35231-2017 Specifications for surface meteorological observation—Radiation GB/T 35232-2017 Specifications for surface meteorological observation—Sunshine GB/T 35233-2017 Specifications for surface meteorological observation—Soil temperature GB/T 35234-2017 Specifications for surface meteorological observation—Frozen soil GB/T 35237-2017 Specifications for surface meteorological observation—Automatic observation GB/T 39228-2020 Determination of soil microbial biomass—Fumigation-extraction method GB/T 52230-2017 HJ 493-2009 Water quality: Sample preservation and management technical regulations HJ 494-2009 Water quality sampling technical guidance HJ 615-2011 Soil organic carbon determination using potassium dichromate oxidation-spectrophotometry HJ 618-2011 The determination of PM10 and PM2.5 in ambient air by weight method HJ 636-2012 Water quality determination of total nitrogen by alkaline potassium persulfate digestion and UV spectrophotometry HJ 654-2013 Technical requirements and testing methods for continuous automatic monitoring system for gaseous pollutants in ambient air (SO2, NO2, O3, CO) HJ717-2014 Soil quality determination of total nitrogen - Kjeldahl method HJ 1221-2021 Environmental air: Determination of dust fall using weight method HJ 1263-2022 Determination of Total Suspended Particles in Ambient Air - Weight Method LY/T 1213-1999 LY/T 1228-2015 Nitrogen determination methods of forest soils LY/T 1232-2015 Phosphorus determination methods of forest soils LY/T 1234-2015 Potassium determination methods of forest soils LY/T 1251-1999 LY/T 1698-2007 Indicator system for long-term observation of desert ecosystem LY/T 1752-2008 Observation technical regulations for desert ecosystem NY/T 295-1995 The determination of cation exchange capacity and exchangeable bases in neutral soil NY/T 300-1995 The determination of available phosphorus in organic fertilizer NY/T 1121.3-2006 Soil testing Part 3: Determination of soil mechanical composition NY/T 1121.4-2006 Soil testing Part 4: Determination of soil bulk density NY/T 1233-2006 The Specification for Monitoring Technologies for Grassland Resources and Ecology NY/T 2997-2016 NY/T 2997-2016 Grassland Classification NY/T 2998-2016 NY/T 2998-2016 Grassland Resource Survey Technical Regulations NY/T 3448-2019 Natural grassland degradation grading SL79-1994 SN/T 2757-2011 LY/T 1215-1999 Determination of forest soil water-physical properties LY/T 1231-1999 Determination of ammonium nitrogen in forest soil LY/T 1239-1999 Determination of pH value in forest soil HJ 717-2014 Soil quality determination of total nitrogen - Kjeldahl method