Method for safety precaution of producing area of farm product in long term
A technology for safety early warning and agricultural products, applied in instruments, data processing applications, calculations, etc., can solve problems such as poor applicability and difficult promotion
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[0065] Embodiment: Take the measured data in Zunyi area as an example to further illustrate the present invention. The calculation process is as follows:
[0066] 1. According to the characteristics of the area to be tested, the elements to be measured are selected in accordance with the national soil environmental quality standards
[0067] The five heavy metal elements measured in Zunyi area are Cd, Pb, Cr, Hg, As and the local soil pH value is between 6.5 and 7.5. The content standards of five elements in the national standard are selected, as shown in Table 4 below:
[0068] Table 4 Content Standards of Five Elements
[0069] Soil pH
6.5~7.5
project
Cadmium
0.6
lead
300
Chromium (paddy field)
300
HG
0.5
Arsenic (paddy field)
25
[0070] 2. Construct the judgment matrix
[0071] The principle of the AHP method, when constructing the judgment matrix, when the number of factor...
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