“Producer” or “grower” means any person who is engaged within this state in the business of producing or causing to be produced on land totaling more than one acre, either for fresh market or for processing, cherries of any variety, and who upon request, provides proof of commodity sale. For purposes of voting, “producer” or “grower” does not include a person who purchases a cherry crop on the tree, and the right to vote remains with the person selling the cherry crop on the tree to the purchaser.