Evaluation of different metering devices for multi-crop seeding

Than Shein

Date

1988

Abstract

The performance and design parameters of five metering devices were tested with sorghum, wheat, mungbean, soybean, cowpea, corn and peanut. Cell diameter, plate thickness, and cell speed for horizontal plate metering device, hole diameter, seed level and hole peripheral speed for perforated drum metering service, groove depth, number of grooves and roller thickness for foam roller metering device, throat opening for foam pad metering device were tested as independent variables. By using the Box Behnken method, second order empirical equations for each metering device and crop were established to determine discharge rate at various levels of independent variables. The effects of independent variables on discharge rate, metering accuracy and seed damage were analyzed. The inclined plate metering is the most suitable device for multi-crop seeding. It could meter sorghum, wheat, mungbean, soybean, cowpea and corn with the accuracy of 96 to 00 percent without seed damage. Peanut could be metered with high accuracy but seed damage of about 9 percent occurred. Horizontal plate metering ranked second for multi-crop seeding. It could meter sorghum, wheat, mungbean, soybean, cowpea, corn and peanut with accuracy of 95 to 99 percent but seed damage particularly for peanut, sorghum and soybean were very high. From pad metering device ranked third for multi-crop seeding. It could meter sorghum, wheat, mungbean and soybean with accuracy of 96 ti 98 percent without seed damage. Perforated drum metering device could be used for closed grown crops such as sorghum, wheat and mungbean. The metering accuracy was 90 to 95 percent if the seed level could be maintained within the allowable limits. No seed damage occurred by using perforated drum metering device. Foam roller metering device is not recommended for use in multi-crop seeding since the metering accuracy was very low and seed distribution was not uniform. The optimum design parameters of each metering devices were determined and further improvement for suitability to multi-crop seeding were also recommended.

Document Type

Master Thesis

Language

English

LC Subject

Drill (Agricultural emplements)

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 995 1988 A2 T43

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