Agricultural Land Soil Testing

1. Introduction to Agricultural Land Soil Testing

Agricultural land refers to cultivated land, garden plots, and grassland. Soil pollution in agricultural land can adversely affect the quality and safety of agricultural products, the growth of crops, and the ecological environment of the soil.

Agricultural land soil pollution testing involves sampling and analyzing the soil to determine the types and concentrations of pollutants present.

2. Testing Scope

(1) Cultivated land soil: including paddy fields, irrigated land, and dryland soil;

(2) Garden plot soil: including orchard and tea garden soil;

(3) Grassland soil: including natural pasture and artificial pasture soil.

3. Testing Items

(1) Trace elements: available zinc, available silicon, available sulfur, exchangeable calcium, available iron, available manganese, available copper, exchangeable magnesium, exchangeable potassium, exchangeable sodium, etc.

(2) Conventional indicators: sulfate, nitrate nitrogen, ammonium nitrogen, pH, total salt content, chloride ions, nitrite nitrogen, etc.

(3) Heavy metal pollution: mercury, nickel, copper, lead, arsenic, cadmium, chromium, zinc, etc.

(4) Organic pollutants: mineral oil, volatile organic compounds, benzo(a)pyrene, organochlorine pesticides, organophosphorus pesticides, etc.

(5) Fertility indicators: total nitrogen, total phosphorus, total potassium, organic matter, organic carbon, hydrolyzable nitrogen, available phosphorus, available potassium, etc.

4. Relevant Standards

"Soil Environmental Quality—Risk Control Standard for Soil Contamination of Agricultural Land (Trial)" GB 15618-2018

"Technical Specification for Soil Environmental Monitoring" HJ/T 166-2004

"Soil Quality—Guidance on Sampling Techniques" GB/T 36197-2018

"Soil Quality—Guidance on Long-term and Short-term Storage of Soil Samples" GB/T 32722-2016

"Determination of Total Chromium in Soil—Flame Atomic Absorption Spectrophotometry" HJ 491-2009

"Determination of Nickel in Soil—Flame Atomic Absorption Spectrophotometry" GB/T 17139-1997

"Determination of Total Mercury, Total Arsenic, and Total Lead in Soil—Atomic Fluorescence Spectrometry" GB/T 22105-2008

"Determination of Copper and Zinc in Soil—Flame Atomic Absorption Spectrophotometry" GB/T 17138-1997

"Determination of Lead and Cadmium in Soil—Graphite Furnace Atomic Absorption Spectrophotometry" GB/T 17141-1997