The Canadia Federation of Agriculture (CFA) wants farmers to voice their concerns about proposed tax changes that it says could lead to "severe negative impacts for farm business planning."

Finance Canada tabled the proposals in mid-July and is accepting comments until Oct 2.

The CFA says that a 75-day consultation in the middle of harvest is not enough time to allow a comprehensive review.

"These tax proposals represent transformative changes that would bring about major uncertainty for farms that are incorporated, especially for multi-generational family farms. The government must recognize that small business owners face unique risks and costs - especially in agriculture where farmers must plan for a wide range of factors that can affect their operations from year to year," said CFA President Ron Bonnett.

The farm lobby group worries that if these changes are implemented as proposed, farmers will face higher costs with fewer options to manage business risks, and the complexity of the proposals could lead to other unintended consequences.

CFA has joined with 35 other organizations to form the new Coalition for Small Business Tax Fairness, which sent a joint letter sent to Finance Minister Bill Moreau, outlining shared views.