Jaipala, S., Wirojwattanakul, K., Srimungkun, B. and Wannawong, O. 2012. Effect of Glyphosate Herbicide Spraying Period on Growth and Yield of Cassava Variety Rayong 11  . Thai Agricultural Research Journal. 30, 2 (Aug. 2012), 186–197. DOI:https://doi.org/10.14456/thaidoa-agres.2012.6.