1. Graduate School of Science and Technology, University of Tsukuba, Tennodai 1-1-1, Tsukuba 305-8572, Ibaraki, Japan
2. Department of Agricultural Engineering, Yezin Agricultural University, Nay Phi Taw 150501, Myanmar
3. Department of Agricultural Engineering, University of Peradeniya, Kandy 20400, Sri Lanka
4. Institute of Life and Environmental Sciences, University of Tsukuba, Tennodai 1-1-1, Tsukuba 305-8572, Ibaraki, Japan