USDA ESTIMATES CANADIAN CROPS The U.S. Agriculture Department estimated Canada's 1986/87 wheat crop at 31.85 mln tonnes, vs 31.85 mln tonnes last month. It estimated 1985/86 output at 24.25 mln tonnes, vs 24.25 mln last month. Canadian 1986/87 coarse grain production is projected at 27.62 mln tonnes, vs 27.62 mln tonnes last month. Production in 1985/86 is estimated at 24.95 mln tonnes, vs 24.95 mln last month. Canadian wheat exports in 1986/87 are forecast at 19.00 mln tonnes, vs 18.00 mln tonnes last month. Exports in 1985/86 are estimated at 17.71 mln tonnes, vs 17.72 mln last month.