Improvement of a Rice Seed Pelleting Machine for Direct Seeding in Rice Cultivation(II)-Physical and cultural properties of the rice-seed pellets-
2003
Yu, D.S. | Yoo, S.N. | Choi, Y.S. (Chonnam National University, Gwangju, Republic of Korea)
Physical and cultural properties were investigated on the rice-seed pellets made by the pelleting machine as the changes with mixing ratios of soil to rice seed of 6:1. 7:1, and 8:1 and rotating speeds of forming rolls of 7,10, and 13 rpm. Average weight, average diameter, and average sphericity of the pellets were 1.70g, 12.0mm, and 99.1% respectively. Average number of seeds per pellet was more than 3, and almost all pellets had more than 3 seeds in the cases of mixing ratios of 6:1, and 7:1 at the forming roll's speed of 7rpm. Gradual drying was needed because rapid drying caused cracks on surface of the pellets.
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