Wheat around central Ohio has greened-up and there has been nitrogen applications made to many fields, but not all. Right now in most fields ground conditions are still not fit for any applications, but with wheat progressing along in growth stages, many growers will likely take advantage of the next dry spell and get their wheat applications completed. Before going to the field, here are a couple things to keep in mind.
- Nitrogen rate and timing- Ideally nitrogen should be applied just prior to Feekes 6.0 (jointing/stem elongation). This is when nitrogen uptake really starts to increase. As for the rate, keep in mind what your realistic yield potential is. The Tri State fertilizer guide recommends 110 lb of N for yield goals of 90+ bu/ac. This calculation takes into account any fall applied N up to 20 lbs. To figure out an exact rate of N to be applied for a specific yield goal use the following formula…
N rate= 40 + [ 1.75 x (yield potential-50)]
After calculating the N rate, subtract any fall applied N up to 20 lbs and this will be your recommended spring applied rate.
Herbicide applications- applications should be done prior to Feekes 6.0 as many phenoxy herbicides such as 2,4-D and Banvel are off label once wheat reaches this growth stage. There are some ALS herbicides that can still be used after jointing, but become less effective because typically weeds are larger at this point. Be sure to check the herbicide label if UAN is in the tank mix as certain product loose effectiveness with UAN tank mixes. Also, make sure you are using proper adjuvants as some of these chemistries require NIS, AMS or a combination of the two.Read More About: Herbicide applications, novus ag, spring nitrogen, wheat