If the fields have from 25 to 50 percent legume, add about 25 lbs nitrogen per acre after each hay harvest or each grazing cycle. If there is less than 25 percent legume in the mix, then apply up to 50 lbs nitrogen per acre per cutting or grazing cycle. When needed, surface applications of lime are effective but do not wait too long as frequent smaller applications will be more efficient at maintaining productivity than one heavy application . Also keep in mind with boron applications, that although boron is required for maximum productivity of pastures and hay fields, even slight over-applications of boron can be toxic to the crop. Be very certain the application rates are within agronomic guidelines.
Local fields have spots of stunted and yellow corn.
You may feel the need to rush out and apply fertilizer. However, warm night time temperatures and some more moisture will correct most of the problem. We did our own little test plot on yellow, stunted corn here at the REC farm, and found that it did not matter what kind of fertilizer we applied or did not apply. All the corn looks better after we caught a few showers at the beginning of the week. Sorghum is drought tolerant when it is not planted too thick and is over fertilized with nitrogen.