Studies on the Direct Underground Sowing Machines in the Paddy Field. (2)

Trial Production of Seed-metering Device and Seed-distributor

Abstract

A seed-metering device and seed-distributor were designed and constructed. These were for the direct underground sowing machines in the paddy field, and in this system the transportation of coated seeds was done by air flow in seed conductor tubes. The results were summerized as follows:
1. For seed-metering devices, an internal force feed mechanism were adopted. The control of the quantity of seed metering was done by a feed plate and was made sure of the stable supply of seeds.
2. The A-type seed-metering device was the original type and B-type was an improved one for deeply submerged paddy field.
3. Even the space between the receiving rool and the case was very narrow, by use of new type receiving cell, the damage of coated seed by metering became negligible.
4. For seed distribution, two types of seed-distributors were developed.
5. The first type was a uniform rotating pipes seed-distributor and the uniformity was obtained to mix up two pipes of seeds in each case automatically.
6. The second type was a static type and was equipped with separating plates for seed distribution.