Jindaarat Chuenrung และ Uthai Aromrat; Tawatchai Na Nagara. (2006) Effects of Tridymite, Yod Doi and Boom Khamtorn Soil Conditioners on Physical and Chemical Properties of Soil and Rice Yield. <i>Thai Agricultural Research Journal</i>, <i>24</i>(2), 153-167.Jindaarat Chuenrung และ Uthai Aromrat; Tawatchai Na Nagara. "Effects of Tridymite, Yod Doi and Boom Khamtorn Soil Conditioners on Physical and Chemical Properties of Soil and Rice Yield". Thai Agricultural Research Journal 24 (2006):153-167.Jindaarat Chuenrung และ Uthai Aromrat; Tawatchai Na Nagara. Effects of Tridymite, Yod Doi and Boom Khamtorn Soil Conditioners on Physical and Chemical Properties of Soil and Rice Yield. Department of Agriculture:ม.ป.ท. 2006.