Vorapitirangsree, V., Jaipin, P. , Vorapitirangsree, S., Bumphenyoo, W., Kaewseeda, W. and Hanviriyapan, P. 2013. Production System Trial of Longon Low Canopy Pruning Orchard in Chiang Rai Province. Thai Agricultural Research Journal. 31, 1 (Mar. 2013), 69–77. DOI:https://doi.org/10.14456/thaidoa-agres.2013.19.