Mid-County Newsletter MCnewsletter-fall10 - Page 3

Mid-County Agronomy Yield goals and long-term fertility sustainability Joe Forner - Agronomist When I started as agronomist back in 1999, I would be sitting down with a farmer and planning the next year’s fertilizer needs, and we were typically using yield goals of 150 bushels/acre. If we felt that the piece of ground was exceptional, we would push it all the way to 160 bushels/acre. Eleven years later, these yields would be close to a crop failure on some of the better ground in Carver County. So what is a yield goal, and how much fertilizer do you need to ap- ply for the year 2011? Before I an- swer that question, there are a couple of prereq