DB32/T 4524-2023 The fertilizer-free cultivation of green leafy vegetables requires technical specifications for matrix technology

GB 7959-1987 Sanitary standard for the non-hazardous treatment of night soil GB 7959-2012 Hygienic requirements for harmless disposal of night soil GB/T 8170-1987 Rules for rounding off of numberical values GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgement of limiting values GB/T 17136 GB/T 17141 GB/T 19524.1-2004 Determination of fecal coliforms in fertilizers GB/T 19524.2-2004 Determination of mortality of ascarid egg in fertilizers GB/T 22105.1-2008 Soil quality—Analysis of total mercury,arsenic and lead contents—Atomic fluorescence spectrometry—Part 1:Analysis of total mercury contents in soils GB/T 22105.2-2008 Soil quality—Analysis of total mercury,arsenic and lead contents—Atomic fluorescence spectrometry—Part 2:Analysis of total arsenic contents in soils GB/T 22105.3-2008 Soil quality—Analysis of total mercury,arsenic and lead contents—Atomic fluorescence spectrometry—Part 3:Analysis of total lead contents in soils GB/T 32951-2016 Determination of oxytetracyline, tetracyline, chlortetracycline and doxycycline content for organic fertilizers—HPLC method GB/T 33891-2017 Organic media for greening HJ 491-2009 Determination of Total Chromium in Soil by Flame Atomic Absorption Spectrometry HJ 491-2019 Soil and sediment determination of copper, zinc, lead, nickel, and chromium using flame atomic absorption spectrophotometry LY/T 1251 LY/T 1228-2015 Nitrogen determination methods of forest soils LY/T 1228-1999 Determination of total nitrogen in forest soil NY 525-2002 Organic fertilizer NY/T 525-2021 NY/T 525-2021 Organic fertilizer NY 525-2011 NY 525-2011 Organic fertilizer NY 525-2012 NY 525-2012 Organic fertilizer NY/T 2118-2012 vegetable seedling matrix