Phan Hieu Hien, Tran Van Khanh# # , Graeme R. Quick ***
# Paper for presentation at the International Conference on Crop Harvesting and Processing,
February 11-14 2007, Louisville, Kentucky.
# # Lecturers, Nong-Lam University (formerly: University of Agriculture and Forestry), Ho-
Chi-Minh City, Viet Nam,
*** Consulting Engineer (Queensland, Australia) and Former Head, IRRI Agricultural