Mechanization : towards increased productivity : proceedings of the National Conference on Mechanized Agriculture, 25-27 May, 1993, Genting Highlands, Pahang Darul Makmur, Malaysia... by National Conference on Mechanized Agriculture (1993 : Genting Highlands), Ayob Sukra, Ooi, Ho Seng, Ailin Ton Isahak, Institut Penyelidikan dan Kemajuan Pertanian Malaysia, Institut Pertanian Malaysia