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https://sootinclaimon.com/2018/01/21/%e0%b9%81%e0%b8%88%e0%b8%87%e0%b8%aa%e0%b8%b5%e0%b9%88%e0%b9%80%e0%b8%9a%e0%b8%b5%e0%b8%a2-%e0%b8%ab%e0%b8%8d%e0%b9%89%e0%b8%b2%e0%b9%81%e0%b8%9d%e0%b8%81%e0%b9%80%e0%b8%9e%e0%b8%b7%e0%b9%88/
แจงสี่เบีย : หญ้าแฝกเพื่อการอนุรักษ์ดินและน้ำ