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2016, vol. 41, iss. 4, pp. 35-41
Metering unit performance of a vacuum type precision vegetable planter
Ege University, Faculty of Agriculture, Department of Agricultural Engineering and Technology, Izmir, Turkey

emailarzu.yazgi@ege.edu.tr
Keywords: carrot; onion; vacuum precision seeding; seed distribution accuracy
Abstract
The objective of this study was to determine the seeding performance of a precision vegetable planter with vacuum type metering unit at different seed spacings and forward speeds using onion and carrot seeds. The seeding performances were investigated and evaluated based on the seed distribution accuracy on sticky belt stand tests in laboratory conditions. The experiments were conducted at the forward speeds of 1.0, 1.5 and 2.0 m s-1, and seed spacing of 25 and 50 mm for each seed. The vacuum plate of precision metering unit with 90 holes and hole diameter of 0.8 mm was used. The seed distribution accuracy was determined according to the factor of variation (Vƒ) and goodness criteria (λ) which are represented to be compatible with the Poisson distribution. The factors of variation were found in the range of 0.74-0.89 for carrot and 0.52-0.55 for onion. These values indicated that carrot and onion seeds can be planted in the character of precision seeding by a vacuum type vegetable planter. According to results of the experimental tests it was found that seed distribution accuracy of machine was in very good quality for carrot (λ = %78.42-%93.16) and onion (λ = %88.95-%94.11) seeds.

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article language: English
document type: Original Scientific Paper
published in SCIndeks: 24/02/2017

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