Masafumi Mitarai

Study on the Soil Fumigator for Distributing Granular Nematicides into Soil (Part 1)

The purpose of this study is to develop a granular type soil disinfector. A DC blower type distributor incorporated a distributing inside cylinder with five or eight outlets was devised to make the machine lighter, smaller and simpler, and also to improve the work accuracy and performance and the effect of nematode control. The distributor devised as a trial produced ringshaped wind, which velocity was 18-22m/s when the fan rotational speed was 3500rpm. The coefficients of variation of distribution and delivey rate were less than 6-8% and 4-4%, respectively. It was prove d that the distributor had stable performance characteristics. Because the weight ratio of granule pulverized into 0.5-1.0mm size was less than 7% and that of smaller than 0.5mm size was about 2%, it was inf erredreasonably that there was little effect of the distributor on the granular pulverization. * 1983年4月 第42回 農 機学 会年次大会(琉 球大学)に て 一部 講演 ** 宮崎大学農学部(〒889-21宮 崎市学 園木花 台西1-1 〓0985-58-2811) Faculty of Agriculture, Miyazaki University, Miyazaki-shi, 889-21 Japan 34 農 業 機 械 学 会 誌 第55巻 第2号(1993) 〔Keyword〕 soil disinfector, distributor, granular nematicides