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dy were to compare yield, germinating ability of planted crop and ratooning ability of two sugarcane varieties (Khon Kaen 3 and K95-84) and to investigate the effects of agronomic practices after harvest on ratooning ability, growth and yield of first ratooning crop. The experiment was conducted under field conditions at Kalasin province during October 2013 to October 2015. A split plot design with four replications was used in this study. Two sugarcane varieties were assigned in main plots and five agronomic practices consisting of burning, no burning, cutting sugarcane roots at the
sides of the rows with a two-wheel tractor, using a rotating hoe between rows and using a rotating hoe on the rows were arranged in sub plots. Varieties were not significantly different for germination and cane yield of planted crop. Khon Kaen 3 had cane yield of 16.37 tons Rai-1 (0.16 ha) and K95-84 had cane yield of 16.45 tons Rai-1 . Agronomic practices after harvest were significantly different for number of ratoons of first ratooning crop at 1, 2, 3 and 6 months after harvest. Cutting sugarcane roots at the sides of the rows with a two-wheel tractor had the highest number of
ratoons of first ratooning crop but not significant different from using a rotating hoe between rows and no burning. While burnig and a rotating hoe on the rows tended to have low number of ratoons. Agronomic practices were also significantly different for plant height and leaf length of first ratooning crop but they were not significantly different for cane yield. Cutting sugarcane roots at the sides of the rows with a two-wheel tractor tended to have the highest cane yield of first ratooning crop (7.03 tons Rai-1 ) followed by using a rotating hoe between rows (6.86 tons Rai-1 ), no burning (6.33 tons Rai-1 ), burning (5.36 tons Rai-1 ) and using a rotating hoe on the rows (4.69 tons Rai-1 ), respectively. Although cutting sugarcane roots at the sides of the rows with a two-wheel tractor and using a rotating hoe between rows had the highest number of rations of first ratooning crop, they do not increase cane yield if irrigation is not available or the crop is subjected to severe drought, and, therefore, the crop should be irrigated.