Abstract
ABSTRACT DEVELOPMENT of a non-destructive harvester for guayule, Parthenium argentatum, seed has been underway at the University of Arizona since 1978. The initial design used a rotating brush to dislodge seeds but this was found to be too aggressive. Present models rely primarily on suction to dislodge seeds. Harvesting heads are adjustable to accommodate plants of various shapes and sizes. A venturi air system provides suction which reduces seed damage, by not having the seeds pass through the fans. Various attachments for the harvesting heads and automatic head height control have greatly improved performance and ease of operation. Acceptable field performance has been reported in Arizona, California, New Mexico and Texas for harvesters using the author's design.
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