The study of the water hyacinth problem of students in Mathayom 5/1 Phimai Wittaya School. The survey results come as the information and to resolve issues caused by water hyacinth. A questionnaire was used to study such issues, a sample of 20 items by students in the second semester of academic year 2558 5/1 Phimai Wittaya School 30 can be analyzed as follows.
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