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Design and Development of a Multirow Seed Drill for Paddy

Saifullah M.H. Saif
Agricultural Engineering Division, Bangladesh Agricultural Research Council.

M.D.Huda
Department of Farm Power and Machinery, Bangladesh Agricultural University, Mymensingh

M.M. Alam
Department of Farm Power and Machinery, Bangladesh Agricultural University, Mymensingh

Abstract/ Executive Summary:

A unique seed metering device, having cup shaped fluted cells, suitable for paddy was developed and used. A four row animal cum power tiller driven seed drill machine was fabricated using such metering devices and locally available materials and technology. Power was transmitted to the metering shaft from the ground whell shaft through chain-sprocket drive. A single pent hitching system was employed. A satisfactory turning radius of 0.94-1.13 m was obtained in ploughed soil. The power requirement, effective field capacity and field efficiency of the machine at 50.8 mm sowing depth and 2,81 kph ground speed were 0.256 kw, 0.313 ha/ha. and 85% respectively. Skidding of the ground wheels during field operation was limited to 20%.

Keywords: Seed Metering Device, Fabricated,

Location: Department of Farm Power and Machinery, Bangladesh Agricultural University, Mymensingh

Start Date:

End Date:

Program Area: Farm Mechanization

Commodity: Product development

Objectives:

To develop an animal cum power tiller driven seed drill using the metering device designed and developed suitable for paddy

Methodology:

Field test: Draft, skidding of ground wheel. turning radius, effective field capacity, and field efficiency were studied during the field tests. The testing seed bed was prepared by a rotary tiller. Two days after the'first tilling two subsequent tilling followed by laddering were accomplished . The seed drill was hitched to a power tiller with all necessary adjustments. The sowing depth was set at 50.8 mm according to the standard planting depth requirement for rice seeds. A second power tiller was tied to above power tiller-seed drill assembly through a pull type dynamometer. The leading power tiller was operated at selected gear positioned while the second power tiller remained idle all the time. The length of travel, travel time, actual width covered by the seed drill, and itiroiv seed drill far poatly 41 maximum instantaneous draft were measured and recorded simultaneously, Then the seed drill was detached from the idle power tiller and the maximum draft requirement for pulling it was measured and recorded again at the same gear positions. By subracting the latter drafts from the previous one of corresponding test condition actual draft required to pull the seed drill was obtained. During the operation of the machine at certain gear position the number of the ground wheel rotation were counted and percent skidding of the ground wheel were calculated from known wheel diameter and actual travel length. The tests were conducted at two gear positions and each measurement was replicated three times. The minimum turning radius of the seed drill machine was measured at two gear positions on concrete floor as well as on seed bed.

Source of Information: Bangladesh J. Agri. 1996, 21: 37-48

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

1 . The performance of the seed drill was found satisfactory for paddy and expected to perform equally with other similar size seed with relatively smooth surface characteristics than paddy.

2. Cull fill in the range of 3-4 seeds to 4-16 seeds per cell and seed metering pattern were found satisfactory

3. in the field condition the draft and power requirements of the machine were found to be 30 and 33 kg, and 0.141 and 0.236 kW, respectively, at the forward travel speed of 1.7 kph and 2.81 kph.

4. At working gear positions the percent skidding of the ground wheel was found in the range of 8.0-20.5%.

5. The turning radius of the machine on the concrete floor and seed bed was found almost similar and was in the range of 0.92-1.13 m.

6. The effective field capacity and the field efficiency of the machine were found to he 0.313 ha per hour and 85.7%, respectively: at an average ground speed of 2.81 kph.

7. There is a potential to increase the size of the machine if it is powered by a power tiller. The machine could he easily adapted as an animal powered machine.

Knowledge Management: Journal