Development and evaluation of a guayule seed harvester

Bedane, G. M., Gupta, M. L. and George, D. L. (2008) Development and evaluation of a guayule seed harvester. Industrial Crops and Products, 28 2: 177-183. doi:10.1016/j.indcrop.2008.02.007

Author Bedane, G. M.
Gupta, M. L.
George, D. L.
Title Development and evaluation of a guayule seed harvester
Journal name Industrial Crops and Products   Check publisher's open access policy
ISSN 0926-6690
Publication date 2008-09-01
Sub-type Article (original research)
DOI 10.1016/j.indcrop.2008.02.007
Open Access Status
Volume 28
Issue 2
Start page 177
End page 183
Total pages 8
Editor D. T. Ray
M. J. Pascual-Villalobos
N. Belgacem
Place of publication Amsterdam, The Netherlands
Publisher Elsevier BV
Language eng
Subject C1
820699 Harvesting and Packing of Plant Products not elsewhere classified
099901 Agricultural Engineering
Abstract Guayule flowers continuously seed mature at different times; thus, harvesting method that is gentle and non-destructive is required. The main objective of this study was to develop a simple but effective harvesting system capable of dislodging and collecting seed without damaging the plant. A single-row guayule seed harvester was developed after investigating different methods of seed dislodgement and collection. The harvester consisted of a seed dislodgement mechanism that removes seeds by vibration of spring steel rods. An axial flow fan placed directly over the vibrating rods catches the seed before it falls to the ground. The seed is then conveyed by the air stream through an inflatable canvas tube to a collection bin. The design and development of the seed catching system was based on inal velocity of the unthreshed seed. Vibration frequencies ranging from 9.9 to 14.5 Hz and amplitude from 4 to 5.5 cm were used to test the harvester in the field. Harvested seed was analysed for percentages of clean seed in the harvested material, seed loss and immature seeds harvested. The performance of the machine was evaluated based on harvesting capacity and efficiency. Guayule seed harvested by the machine ranged from 1.73 to 7.18 kg/ha and harvest efficiency varied from 77 to 91%. The percentage of immature seeds removed from the crop during mechanical harvesting was as low as 0.1%. Although there was a trend for better efficiency from higher vibration frequencies, the variation was not significant. Nearly 21% of the harvested sample was clean which was much higher than that reported by other researchers. The harvester can be converted into a multiple row machine to increase its capacity. Copyright © 2009 Elsevier B.V. All rights reserved
Keyword Guayule
Seed harvester
Terminal velocity
Seed dislodgement
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online 18 April 2008.

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Created: Fri, 17 Apr 2009, 05:16:45 EST by Emma Cushworth on behalf of School of Land, Crop and Food Sciences