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並前往https://www.fao.org/fishery/docs/CDrom/FAO_Training/FAO_Training/General/x6706e/x6706e06.htm

6. Soil Texture - Fao.org

For fish-pond construction, it is better to have a soil with a high proportion ... the separation limit between sand and silt + clay (see Table 2, line 6).

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