We looked at soil fungi in our long-term rotation study and found increased Fusarium (which causes damping off in soybean) in continuous soybean plots. Some of these alterations may take years to undo as you will be making a long-term impact on your soil and resulting soil health. Be aware that soybean after soybean will alter the pest relationship complex in your fields.

Another long-term rotation study we have (19 years) shows an even bigger yield benefit (13%) to rotating away from soybean for two years (corn and wheat) compared to annually rotating corn and soy. In short, you are setting your long-term profitability up for a hit. Our data clearly shows that 3 or more years of continuous soybean gives you a 7+ bu per acre hit when compared to a corn-soybean rotation and moves you close to the yield levels of continuous soybean. We could hypothesize then that the yield of the 3rd year of continuous soybean (in our experiment) would be like a 2nd year of soybean in a corn soybean (C-S-S) rotation. It is amazing that after 5 years of corn, it only took 3 years of continuous soybean for the yield to drop to within 7% of continuous soybean (20+ years) yield levels whereas 2nd year soybean yielded within 5% of soybean in a corn-soybean rotation. Every year promises of short-term profitability may drive some farmers to consider planting soybean after soybean, rather than rotating, data from our long -term rotation experiment clearly shows the benefit of crop rotation to the soybean crop.

Balancing short-term versus long-term profitability (i.e., economic sustainability).

With that being said, here are some recommendations to consider: Many of our management recommendations remain the same, but we also have some additional recommendations based on recent crop rotation and nutrient management research. These acres have to come from somewhere and many of them will be from second-year soybean.With input costs rising rapidly, especially for nitrogen fertilizers, we thought it was time for another update. This article was originally updated in 2018 when the USDA announced that U.S.

īefore we start, we fully acknowledge our title “Best management practices for growing second or third year soybean” is a bit misleading as we do not advocate this practice (it’s not a BMP!) but we thought we could sucker you into reading this article if it had an enticing title! Conley, Seth Naeve and John Gaska December 14, 2016.

Mr bin cartoon video