1. The hydrolysis nitrogen （alkaline hydrolysis nitrogen） LY/T 1229-1999 "the forest soil hydrolytic nitrogen". Alkaline hydrolysis - diffusion method. If measurements > 200 mg/kg, allowing the absolute deviation < 10 mg/kg; Measurements of 200 mg/kg ~ 50 mg/kg, allow absolute deviation 10 mg/kg ~ 2.5 mg/kg; Measured value < 50 mg/kg, allowing the absolute deviation < 2.5 mg/kg. In 1.8 mol/L sodium hydroxide treatment of soil, the soil under the condition of alkaline hydrolysis, make easy hydrolysis nitrogen into ammonia nitrogen, absorbed by the boric acid, alkali solution nitrogen content was calculated by the standard acid titration.
　　2. Total nitrogen NY/T 53-1987 soil total nitrogen determination method. Semi-micro kjeldahl method. Allow poor: parallel determination results of soil nitrogen content > 0.1%, shall not be > 0.005%, 0.1 0.06% nitrogen, shall not be > 0.004%, nitrogen < 0.06%, shall not be > 0.003%. Total nitrogen in the soil in the presence of copper sulfate, potassium sulfate and selenium powder, cooks with concentrated sulfuric acid and various kinds of nitrogenous organic compounds through high temperature decomposition is converted to ammonium nitrogen, and then use sodium hydroxide alkaline, heating distilling ammonia by boric acid absorption, its content is using standard acid titration.
　　3. The total phosphorus LY/T 1232-1999 "the forest soil total phosphorus determination". Acid soluble - molybdenum antimony colorimetric method. Measurements > 2 g/kg, absolute deviation > 1016 g/kg; Measurements of 2 g/kg ~ 1 g/kg, absolute deviation is 0.06 ~ 0.03 g/kg; Measured value < 1, absolute deviation < 0.03. Taking sulfuric acid - perchloric acid dissolved phosphorus in the soil, with molybdenum antimony colorimetric method.
　　4. Effective phosphorus LY/T 1233-1999 forest measurement of available p in soil.
　　4.1 hydrochloric acid - sulfuric acid extraction. Measurements > 25 mg/kg, absolute deviation > 2.5 mg/kg; Measurements of 25 mg/kg ~ 10 mg/kg, absolute deviation is 2.5 mg/kg ~ 1.0 mg/kg; Measurements < 10 mg/kg ~ 2.5 mg/kg, absolute deviation is 1.0 mg/kg ~ 0.5 mg/kg, the determination of values < 2.5 mg/kg, absolute deviation < 0.5 mg/kg. Extraction using hydrochloric acid and sulfuric acid solution: use a mixture of hydrochloric acid and sulfuric acid leaching solution dissolved iron phosphate, aluminum salts in the soil, reoccupy molybdenum antimony colorimetric method can determine the resistance of phosphorus leaching solution.
　　4.2 0.5 mol/L sodium bicarbonate extraction. Measurements > 25 mg/kg, absolute deviation > 2.5 mg/kg; Measurements of 25 mg/kg ~ 10 mg/kg, absolute deviation is 2.5 mg/kg ~ 1.0 mg/kg; Measurements < 10 mg/kg ~ 2.5 mg/kg, absolute deviation is 1.0 mg/kg ~ 0.5 mg/kg, the determination of values < 2.5 mg/kg, absolute deviation < 0.5 mg/kg. Bicarbonate of soda leaching of soil, can inhibit the solution of calcium ion activity, make some active calcium carbonate have been leaching out, also can make the active iron phosphate and aluminium salt water by leaching solution, the leaching liquid of phosphorus secondary precipitation, not available molybdenum antimony colorimetric method quantitative resistance.
　　5. Effective phosphorus NY/T 149-1990 the calcareous soil effective phosphorus determination method. Bicarbonate of soda leaching - molybdenum antimony colorimetric method. Allow poor: parallel determination results measured value < 10 mg/kg on absolute difference, P values < 0.5 mg/kg P; Measurements for 10 to 20 mg/kg P, the absolute difference values < 1.0 mg/kg P; Measurements > 20 mg/kg P, relative error < 5%. In 0.5 mol/L sodium bicarbonate leaching of soil effective phosphorus. Sodium bicarbonate can inhibit the activity of Ca2 + ions in the solution, makes some active larger LinSuanGaiYan leaching out; At the same time liquid can make active iron phosphate, aluminum salt solution by leaching. The leaching liquid of phosphorus from the secondary precipitation; Available molybdenum antimony colorimetric method quantitative resistance. Measurements and crop high correlation with the reaction of the phosphate fertilizer.
　　6. Total potassium LY/T 1234-1999 "the determination of forest soil total potassium. Acid soluble - flame photometry. Measurements > 20 g/kg, absolute deviation > 0.8 g/kg; Measurements of 20 g/kg ~ 10 g/kg, absolute deviation is 0.8 g/kg ~ 0.4 g/kg; Measured value < 10 g/kg, absolute deviation < 0.4 g/kg. Hydrofluoric acid - potassium perchlorate dissolved in the soil, using flame photometer method determination of potassium.
　　7. Slowly available potassium LY/T 1235-1999 "the determination of forest soil slowly available potassium. Boil 1 mol/L nitric acid leaching - flame photometry. Measurements > 200 mg/kg, absolute deviation > 10 mg/kg; Measurements of 200 mg/kg and 200 mg/kg, absolute deviation 10 mg/kg ~ 25 mg/kg; Measured value < 50 mg/kg, absolute deviation < 2.5 mg/kg. Boil 1 mol/L nitric acid leaching potassium amount after deducting rapidly-available potassium content is the slowly available potassium content.
　　8. Available k LY/T 1236-1999 "the determination of forest soil available potassium. 1 mol/L acetic acid ammonium leaching - flame photometry. Measurements > 200 mg/kg, absolute deviation > 10 mg/kg measurements; 200 mg/kg and 200 mg/kg, absolute deviation 10 mg/kg ~ 25 mg/kg; Measured value < 50 mg/kg, absolute deviation < 2.5 mg/kg. Under neutral condition, the surface of soil colloid potassium and ammonium ion exchange, together with the water soluble potassium ions into the solution, the leaching liquid of potassium can be directly by flame photometer.
　　9. Total potassium NY/T 87-1988 the act of determination of total potassium in soil. The parallel determination results allow poor < 0.05%. The soil organic matter with nitric acid and perchloric acid heating oxidation first, and then use hydrofluoric acid decomposition of silicate minerals, such as silicon and fluorine to form silicon tetrafluoride escape. Continue heating was out to the rest of the acid, the mineral elements into metal oxide or salts. With a solution of hydrochloric acid residue, which changes the potassium as potassium ions. Properly diluted by flame photometry, or atomic absorption spectrophotometric method for determination of potassium ion concentration in solution, then converted to soil potassium content.
　　The organic matter was NY/T 85-1988 the act of soil organic matter determination. Parallel determination results allow poor: < 1%, the difference of soil organic matter content < 0.05%; Content is 1% - 4%, < 0.10%; Content 4% - 7%, < 4%; Content > 10%, the difference between < 0.50%. Using quantitative potassium dichromate - sulfuric acid solution, the oxidation of heating accelerated soil organic matter, soil organic carbon oxidized to carbon dioxide, and reduction of dichromate ion of trivalent ions, the rest of the potassium dichromate with bivalent iron standard solution titration, and silicon dioxide as additives for reagent blank calibration, according to the poor quality of antioxidant value before and after oxidation, can calculate the organic carbon content. And then multiplied by the coefficient of 1.724, is the soil organic matter content.
　　11. The pH LY/T 1239-1999 "the determination of forest soil pH value". Potential method. Two parallel to the sample determination results allow bad 0.1 pH; Indoor and strict control of the determination results allow poor pH 0.02. Water or salt solution leaching, beaten with water or salt water solution, balance of 30 minutes, and then measured by pH meter.
　　12. The sodium NY/T 296-1995 "the determination of soil total calcium, magnesium, sodium,". Flame photometry. When measurements > 30 g/kg, relative difference of < 3%; Measurements 10 to 30 g/kg, the relative difference of < 5%; When the measured value < 10 g/kg, the relative difference < 10%. Soil samples by hydrofluoric acid, perchloric acid digestion method, or lithium carbonate, boric acid powder, graphite crucible melting method for measuring liquid, sodium was determined by flame photometer （wavelength of 589 nm）
　　13. Effective copper LY/T 1260-1999 "the determination of forest soil effective copper". Atomic absorption spectrophotometry. Measurements of 300 mg/kg and 300 mg/kg, absolute deviation 15 mg/kg ~ 5 mg/kg; Measurements of 100 mg/kg ~ 10 mg/kg, absolute deviation of 5 mg/kg ~ 0.5 mg/kg; Measurements of 10 mg/kg ~ 1 mg/kg, absolute deviation is 0.5 mg/kg ~ 0.05 mg/kg; Determination of value of 1 mg/kg ~ 0.2 mg/kg, absolute deviation is 0.05 mg/kg ~ 0.02 mg/kg; Measurements of 0.2 mg/kg ~ 0.1 mg/kg, absolute deviation is 0.02 mg/kg ~ 0.01 mg/kg; Measured values < 0.1 mg/kg; Absolute deviation < 0.01 mg/kg. The content of copper was determined by atomic absorption spectrophotometer.
　　14. All copper NY/TF 011-1998, the total quantity of copper in soil, the determination method of zinc, iron, manganese. Atomic absorption method （non-standard）。 The parallel determination results allows relatively are 10% or less. Soil samples with nitric acid - perchloric acid digestion by the oxidation of organic matter, hydrofluoric acid desilication, reoccupy fluorine perchlorate. Digest the content dissolved in hydrochloric acid, copper in solution was determined by atomic absorption spectrometry.
　　15. Effective zinc LY/T 1261-1999 "the determination of forest soil effective zinc. Atomic absorption spectrophotometry. Measurements of 300 mg/kg and 300 mg/kg, absolute deviation 15 mg/kg ~ 5 mg/kg; Measurements of 100 mg/kg ~ 10 mg/kg, absolute deviation of 5 mg/kg ~ 0.5 mg/kg; Measurements of 10 mg/kg ~ 1 mg/kg, absolute deviation is 0.5 mg/kg ~ 0.05 mg/kg; Determination of value of 1 mg/kg ~ 0.2 mg/kg, absolute deviation is 0.05 mg/kg ~ 0.02 mg/kg; Measurements of 0.2 mg/kg ~ 0.1 mg/kg, absolute deviation is 0.02 mg/kg ~ 0.01 mg/kg; Measured values < 0.1 mg/kg; Absolute deviation < 0.01 mg/kg. Determine the content of zinc in the atomic absorption spectrophotometer.
　　16. Effective iron LY/T 1262-1999 "the determination of forest soil effective iron". Atomic absorption spectrophotometry. Measurements of 300 mg/kg and 300 mg/kg, absolute deviation 15 mg/kg ~ 5 mg/kg; Measurements of 100 mg/kg ~ 10 mg/kg, absolute deviation of 5 mg/kg ~ 0.5 mg/kg; Measurements of 10 mg/kg ~ 1 mg/kg, absolute deviation is 0.5 mg/kg ~ 0.05 mg/kg; Determination of value of 1 mg/kg ~ 0.2 mg/kg, absolute deviation is 0.05 mg/kg ~ 0.02 mg/kg; Measurements of 0.2 mg/kg ~ 0.1 mg/kg, absolute deviation is 0.02 mg/kg ~ 0.01 mg/kg; Measured values < 0.1 mg/kg; Absolute deviation < 0.01 mg/kg. By atomic absorption spectrophotometer can directly determine the content of iron.
　　17. Arsenic GB 8915-8915 "the health standard of arsenic in soil. In the presence of potassium iodide and stannous chloride, with zinc sulfate solution, reducing the arsenic for easy gasification hydrogen arsenide （AsH）， then the silver halide （AgDDTC） and hydrogen arsenide, generate colloidal elemental silver, red purple color quantitative.
　　18. Full of lead, cadmium NY/TF 012-1998 "the total quantity in soil determination method of lead, cadmium, nickel. Atomic absorption method （non-standard）。 The parallel determination results allows relatively are 10% or less. Soil samples treated with aqua regia - perchloric acid digestion, potassium iodide - methyl isobutyl ketone after extraction enrichment, atomic absorption spectrometry.
　　19. The total chromium NY/TF 013-1998 "method for determination of the quantity of soil total chromium. Atomic absorption method （non-standard）。 The parallel determination results allows relatively are 10% or less. Soil samples after nitric acid - hydrogen peroxide decomposition, in various valence of chromium compounds into soluble hexavalent chromium ion, with focal potassium sulfate as inhibitor, using atomic absorption spectrometry.
　　20. Effective boron TF/JF - 3.1-1988 "the determination of soil effective boron. The ICP method （non-standard）。 Soil samples with hot water immersion boron is put forward, using plasma emission spectrometry determination of boron content.
　　21. Effective sulfur TF/JF - 3.6-1988 "the determination of soil effective sulfur. The ICP method （non-standard）。 Soil samples with phosphate - acetic acid solution leaching, plasma emission spectrometry.
　　22. Effective silicon TF/JF - 3.5-1988 "the determination of soil available si". The ICP method （non-standard）。 Soil samples in 0.025 mol/L citric acid leaching, silicate by plasma emission spectrometry.
　　23. Effective iron, manganese, copper, zinc SSC - 17.10 the method of icp-aes simultaneous determination effective state content of iron, manganese, copper, zinc （non standard method）。 DTPA - CaCl2 - TEA extraction - icp-aes method. Use pH7.3 DTPA - CaCl2 - TEA extraction calcareous or neutral soil effective state of iron, manganese, copper, zinc, leaching solution after centrifugal filtration can be directly by icp-aes method to determine the content of iron, manganese, copper, zinc
　　24. A balance method of cation exchange capacity （non standard method）。 With ammonium sulfate, ammonium oxalate leaching solution, the oscillation for 30 minutes, make the ammonium ion in the soil calcium, magnesium, sodium, potassium and other cations, let stand filter leaching solution, then adding alkali leaching solution distilling out the replacement after the rest of the ammonia, the boric acid absorption, its content, using standard acid titration conversion of calcium, magnesium, sodium, potassium cation exchange capacity, etc.
　　25. The exchangeable calcium and magnesium ICP spectrometry （non standard method）。 In 1 mol/L acetic acid ammonium leaching of soil samples, and then the exchangeable calcium and magnesium content is determined by ICP method.
　　26. The flame photometry determination of exchangeable sodium （non standard method）。 In 1 mol/L acetic acid ammonium leaching of soil samples, and then use flame photometry determination of exchangeable sodium.
　　27. The soluble LY/T 1251-1999. The conductance method. Water soluble salts in the soil is strong electrolyte, its aqueous solution has a conductive role. The strength of the conductive ability expressed by electrical conductivity. In a certain concentration range, the salt content and electric conductivity of solution were positively correlated, the higher the salt content, the solution of the osmotic pressure, the greater the conductivity. Soil leaching liquid conductivity meter measurement, the electrical conductivity of available and directly by conductivity value of soil salt content.
　　28. Humic acid GB 11957-11957. Volumetric method. Parallel to the determination of absolute difference value: humic acid content < 20% allows a difference of 1.0%; Humic acid content of 20% or higher allows a 2.0% difference. With sodium pyrophosphate alkali extraction from coal sample humic acid or sodium hydroxide solution; Again in strong acid solution, using potassium dichromate oxidation of carbon in the humic acid into carbon dioxide, according to the consumption of potassium dichromate and humic acid containing carbon ratio, to calculate the yield of humic acid.
　　29. The exchangeable mn LY/T 12632-1999 "the determination of forest soil exchangeable mn". Atomic absorption spectrophotometry. Measurements of 300 mg/kg and 300 mg/kg, absolute deviation 15 mg/kg ~ 5 mg/kg; Measurements of 100 mg/kg ~ 10 mg/kg, absolute deviation of 5 mg/kg ~ 0.5 mg/kg; Measurements of 10 mg/kg ~ 1 mg/kg, absolute deviation is 0.5 mg/kg ~ 0.05 mg/kg; Determination of value of 1 mg/kg ~ 0.2 mg/kg, absolute deviation is 0.05 mg/kg ~ 0.02 mg/kg; Measurements of 0.2 mg/kg ~ 0.1 mg/kg, absolute deviation is 0.02 mg/kg ~ 0.01 mg/kg; Measured values < 0.1 mg/kg; Absolute deviation < 0.01 mg/kg. Soil was determined by atomic absorption spectrophotometer direct leaching of manganese content in the liquid.