LY/T 2898-2017 Technical specification of long-term observation of wetland ecosystem

GB/T 4789.1-2003 Microbiological examination of food hygiene—General principles GB/T 4789.1-2008 Microbiological examination of food hygiene—General guidelines GB 4789.1-2010 National food safety standard Food microbiological examination:General guidelines GB 4789.1-2016 National standard for food safety Microbiological examination General provisions for food microbiology GB/T 6276.1-1986 Ammonium hydrogen carbonate for industrial use—Determination of total alkalinity—Volumetric method GB/T 6276.1-2008 Determination of ammonium hydrogen carbonate for industrial use—Part 1:Ammonium hydrogen carbonate content—Acid-base method GB/T 7489-1987 Water quality—Determination of dissolved oxygen—Iodometric method GB/T 7494-1987 Water quality—Determination of anionic surfactants—Methylene blue spectrophotometric method GB 7863 GB/T 11891-1989 Water quality—Determination of kjeldahl nitrogen GB/T 11893-1989 Water quality—Determination of total phosphorus— Ammonium molybdate spectrophotometric method GB/T 11894-1989 Water quality—Determination of total nitrogen—Alkaline potassium persulfate digestion-UV spectrophotometric method GB/T 11901-1989 Water quality—Determination of suspended substance—Gravimetric method GB/T 11903-1989 Water quality—Determination of colority GB 15618-1995 Environmental quality standard for soils GB 15618-2018 Soil environment quality risk control standard for soilcontamination of agriculture land GB/T 16489 GB/T 17134 GB/T 17136 GB/T 17137 GB/T 17140 GB/T 17296-2000 Classification and codes for Chinese soil GB/T 17296-2009 Classification and codes for Chinese soil GB/T 18204.24-2000 Methods for determination of carbon dioxide in air of public places GB/T 24708-2009 Wetland classification GB/T 31705-2015 In situ measurement of background atmospheric carbon dioxide and methane concentration by gas chromatographic (GC) system GB 50179-2015 Code for liquid flow measurment in open channels GB 50324-2014 Frozen soil engineering geological investigation specifications (with explanatory text) HJ 501-2009 Determination of Total Organic Carbon by Combustion Oxidation-Non-Dispersive Infrared Absorption Method for Water Quality HJ 535-2009 Water quality determination of ammonia nitrogen using Nessler's reagent spectrophotometry HJ 632-2011 Soil determination of total phosphorus by alkali fusion-molybdenum antimony spectrophotometry HJ704-2014 Soil Available Phosphorus Determination: Sodium Bicarbonate Extraction-Molybdenum Antimony Antifreeze Spectrophotometry HJ 704-2014 Soil effective phosphorus determination: Sodium bicarbonate extraction-molybdenum antimony colorimetric method HJ 710.10-2014 Technical guidelines for biodiversity monitoring-large-and medium-sized soil animals HJ717-2014 Soil quality determination of total nitrogen - Kjeldahl method HJ 717-2014 Soil quality determination of total nitrogen - Kjeldahl method HJ 743-2015 soil and sediment-determination of polychlorinated biphenyls(PCs)-Gas chromatography mass spectrometry HJ746-2015 Soil oxidation-reduction potential determination using potentiometry HJ 746-2015 Determination of Soil Redox Potential by Potentiometry HJ 784-2016 Determination of polycyclic aromatic hydrocarbons in soils and sediments by high performance liquid chromatography (HPLC) method HY/T 069-2005 Technical specification for red tide monitoring LY/T 1218 LY/T 1234-2015 Potassium determination methods of forest soils LY/T 1234-1999 Determination of total potassium in forest soil LY/T 1236-1999 Determination of available potassium in forest soil LY/T 1255 LY/T 1265 LY/T 1681-2006 Standard of forest pests occurrence and disaster LY/T 1698-2007 Indicator system for long-term observation of desert ecosystem LY/T 1952-2011 Observation methodology for long-term forest ecosystem research LY/T 2085-2013 Technical specification for assessment on forest fire loss LY/T 2090-2013 Indicators system for long-term observation of wetland ecosystem LY/T 2359-2014 Monitoring technical norms for terrestrial wildlife-borne infectious diseases NY/T 296-1995 Determination of Total Amount of Calcium, Magnesium, and Sodium in Soil 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 1121.6-2006 Soil testing Part 6: Determination of soil organic matter NY/T 1121.9-2023 Soil testing Part 9: Determination of available molybdenum in soil NY/T 1121.9-2006 Soil testing Part 9: Determination of available molybdenum in soil NY/T 1121.9-2012 Soil testing Part 9: Determination of available molybdenum in soil NY/T 1121.13-2006 Soil testing Part 13: Determination of exchangeable calcium and magnesium in soil NY/T 1121.16-2006 Soil testing Part 16: Determination of Total Available Water Soluble Salts in Soil NY/T 1377-2007 The determination of pH in soil NY/T 8904 QX/T 45-2007 Ground Meteorological Observation Standards Part 1: General Rules QX/T 46-2007 Ground Meteorological Observation Standards - Part 2: Cloud Observation QX/T 47-2007 Ground Meteorological Observation Standards Part 3: Meteorological Visibility Observation QX/T 48-2007 Ground Meteorological Observation Standards - Part 4: Weather Phenomenon Observation QX/T 49-2007 Ground Meteorological Observation Standards - Part 5: Barometric Observation QX/T 50-2007 Ground Meteorological Observation Standards - Part 6: Observation of Air Temperature and Humidity QX/T 51-2007 Ground Meteorological Observation Standards - Part 7: Observation of Wind Direction and Speed QX/T 52-2007 Ground Meteorological Observation Standards - Part 8: Precipitation Observation QX/T 53-2007 Ground Meteorological Observation Standards - Part 9: Snow Depth and Snow Pressure Observation QX/T 54-2007 Ground Meteorological Observation Standards - Part 10: Evaporation Observation QX/T 55-2007 Ground Meteorological Observation Standards - Part 11: Radiation Observations QX/T 56-2007 Ground Meteorological Observation Standards - Part 12: Sunshine Observation QX/T 57-2007 Ground Meteorological Observation Standards Part 13: Ground Temperature Observation QX/T 58-2007 Specifications for surface meteorological observation Part 14: Measurement of frozen soil QX/T 207-2013 Lake cyanobacterial bloom satellite remote sensing monitoring technology guidelines SC/T 9402-2010 Freshwater plankton survey technical specifications SL 79 SL/T 196-2015 SL/T 196-2015 Hydrometric Survey Specification SL 196-1997 Hydraulic survey codebook/specification