A survey of wheat-growers has shown 82 per cent support an ongoing single selling-desk structure for the marketing of Australian bulk wheat exports.Only 11 per cent supported multiple bulk sellers into overseas markets, and only 6 per cent wanted a totally deregulated system.Tony Windsor, independent federal MP for New England, sponsored the poll, which was conducted by Rural Press Marketing Services. It generated 3,372 responses to an industry-wide survey of about 29,000 growers.Until the Iraq …