LY/T 1752-2008 Observation technical regulations for desert ecosystem

GB 3095-1996 Ambient air quality standard GB/T 15265-1994 Ambient air—Determination of dustfall—Gravimetric method GB/T 20479-2006 Technical regulations of sand and dust storm monitoring HJ/T 166-2004 Soil environmental monitoring technical specifications LY/T 1210-1999 Field sampling and preparation of forest soil samples LY/T 1215-1999 Determination of forest soil water-physical properties LY/T 1218-1999 LY/T 1230-1999 Determination of nitrate nitrogen in forest soil LY/T 1231-1999 Determination of ammonium nitrogen in forest soil LY/T 1232-1999 Determination of total phosphorus in forest soil LY/T 1235-1999 Determination of slow release potassium in forest soil LY/T 1236-1999 Determination of available potassium in forest soil LY/T 1239-1999 Determination of pH value in forest soil LY/T 1251-1999 LY/T 1253-1999 Determination of mineral total elements(silica,iron,aluminium,titanium,manganese,calcium,magnesium,phosphorus)ignition loss in forest soil LY/T 1255-1999 LY/T 1698-2007 Indicator system for long-term observation of desert ecosystem MT/T 633-1996 Long-term groundwater dynamic observation technical specifications NY/T 52-1987 NY/T 53-1987 NY/T 85-1988 Method for determination of soil organic matter 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 890-2004 Determination of Available Zinc, Manganese, Iron, and Copper in Soil Using Diethylenetriaminepentaacetic Acid (DTPA) Extraction Method 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 1121.14-2006 Soil testing Part 14: Determination of available sulfur in soil NY/T 1121.17-2006 Soil testing Part 17: Determination of chloride ion content in soil NY/T 1121.18-2006 Soil testing Part 18: Determination of sulfate ion content in soil NY/TF 011-1998 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 61-2007 Ground Meteorological Observation Standards Part 17: Automatic Weather Station Observations