The Western Canadian Wheat Growers Association is raising the alarm about a federal proposal to roll back the use of fertilizer by 30 percent.

President Gunter Jochum says Ottawa made the heavy-handed environmental proposal without consulting farmers or Fertilizer Canada.

He says it is unworkable and not based on any practical science.

Jochum says the federal proposal would cost a 2,000 acre wheat-canola farm close to $40,000 in production each year or over $800 million on the prairies.