aDepartment of Agronomy, Faculty of Agriculture, Kasetsart University, Bangkok 10900, Thailand
bDepartment of Animal Science, Faculty of Agriculture, Kasetsart University, Bangkok 10900, Thailand
cRubber Research Institute, Rubber Authority of Thailand, Bangkok 10900, Thailand
dChachoengsao Rubber Research Center, Rubber Authority of Thailand, Chachoengsao 24160, Thailand