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https://soclaimon.wordpress.com/2011/08/19/%e0%b8%aa%e0%b8%a3%e0%b8%b8%e0%b8%9b%e0%b8%87%e0%b8%b2%e0%b8%99%e0%b8%a7%e0%b8%b4%e0%b8%88%e0%b8%b1%e0%b8%a2%e0%b8%94%e0%b8%b4%e0%b8%99%e0%b8%9b%e0%b8%b8%e0%b9%8b%e0%b8%a2%e0%b8%9e%e0%b8%b78-10-7/
สรุปงานวิจัยดินปุ๋ยพืชไร่ ครั้งที่1 (ถั่วเหลือง)