Conduct surveys and collect samples of water December 2558 winter sampling water 1 times by 1 sampling stations upstream by the station include upstream station consists of 2 locations, 2 place 2 dots are 8 examples from different areas of upstream station, which will have all 8 samples each sample point will collect plankton by using a known volume of water tank with scoop. Laeokrong 20 litre bag drag through plankton
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