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Development of an Animal Drawn Multirow Seed (rice) Drill

Dr. MA Baqui
Principal Scientific Officer
Farm Machinery and Postharvest Technology Division,Bangladesh Rice Research Institute, Gazipur-1701

Abstract/ Executive Summary:

An animal drawn multirow seed drill has been designed and fabricated. The seed drill was pulled along the strips by two operators at a speed of approx. 1.5 km/hr. The seeds dispensed per unit area were uniform and seeds dropped approximately in line on the threshing floor. The average seed rate was calculated to be 65 kg/ha with a field capacity of approx. 0.17 ha/hr. The germination rate was found to be reduced by 5% which may be attributed to mechanical damage by the seed drill. The slippage of the ground wheels of the seed drill was only 5% which may be considered negligible. The cost of the seed drill is expected to be around Tk. 2000.

Keywords: Seed drill, Field capacity, Slippage, Mechanical damage, Seed rate

Location: FMPHT Research Workshop

Start Date: 01-07-1982

End Date: 30-06-1983

Program Area: Farm Mechanization

Commodity: Seeder

Objectives:

To increase seed rate efficiency To use local material and skill for fabrication

Methodology:

Multi-row animal drawn seed drill has been designed and fabricated in the research workshop. A continuous cylindrical metering device was made from 101.6 mm dia G.I. pipe, with special seed cells (5 rows) for efficient dispensing of seed s with minimum breakage has been used. The hopper is rectangular instead of conventional conical shape which eliminates seed clogging at the throat of the hopper. The length, breadth and height of the hopper is 1022 mm, 76.2 mm and 152.4 mm respectively. Five rows of seed cells, each 22.86 cm apart are engraved in the metering roller with seed cells round the roller at each row. Each seed cell is 22.5 mm long, 9.5 mm wide and its depth increase from 0 to 4.7 mm along the length. The seed drill has three supporting wheels tow large wheels (400 mm dia each) at the rear (these are traction wheels) and one small wheel (200 mm dia) on the front. The centers of the rear wheels are on the axis of the metering roller and the roller is fixed to the axle of the rear wheels in such a way that the roller turns as the wheels rotate. Five furrow openers also 22.86 cm apart from each other are made from tow 6.4 mm metal sheets welded at an angle of 150 to each other. They can be raised or lowered by 76.2 mm. The weight of the seed drill is about 40 hg. Metering roller grazes past the bottom of the hopper and seeds within the cells escape through the bottom of the hopper and is guided through the furrow openers in to the furrows.

Source of Information: Proceedings of BRRI Annual Internal Research Review, 1983

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

During the initial test of the seed drill uniformity in seed distribution and minimum breakage was observed. Later statistically designed tests were conducted on the threshing floor with BR3 seeds. An area of 10 meter x 10.287 meter was selected for the test. The area was divided into equal strips, the width of the strip being equal to that of coverage in each pass by the seed drill. The length of each strip was 10 meters. The seed drill was pulled along the strips by two operators at a speed of approx. 1.5 km/hr. The seeds dispensed per unit area were uniform and seeds dropped approximately in line on the threshing floor. The same treatment was replicated twice. Seeds dispensed through the seed drill were collected and weighed each time of the replication. Thus the average seed rate was calculated to be 65 kg/ha with a field capacity of approx. 0.17 ha/hr. The dispensed seeds and seeds from the hopper were tested for germination by laboratory method. The germination rate was found to be reduced by 5% (as obtained by this laboratory method) which may be attributed to mechanical damage by the seed drill. The slippage of the ground wheels of the seed drill was only 5% which may be considered negligible.

Knowledge Management: Report/Proceedings