The Assoc. of EquipmentManufact-urers (AEM) released industry unit sales for agricultural equipment in North America on Dec. 8.

Below are key takeaways from Ann Duignan and Rahul Chadha at J.P. Morgan:

• December North American over 40-horsepower unit tractor sales are down 10% year over year. North American overall tractor sales (over-40 horsepower) remained weak in December, and combine sales were up modestly on a year-over-year basis. 
• Overall, over 40-horsepower tractors were down 10% year over…