Burrus puts much effort in matching plant populations to specific corn hybrids in order to maximize benefits for our customers. We know that there are corn hybrids that do well at higher populations, as well as those hybrids that perform best at lower planting populations. Those corn hybrids that do well under lower populations are typically a “flex ear,” which can increase its ear size at lower populations with good growing conditions. However, at higher plant populations or growing conditions that consist of higher amounts of stress, “flex ear” hybrids may have a reduced ear size. On the other hand, “fixed ear” hybrids are thought to not perform as well at lower populations because they are not as easily able to increase their ear size. The “fixed ear” hybrids tend to respond well at higher planting populations. The Burrus corn lineup consists of flex, intermediate, and fixed ear types.
Many universities tend to approach planting rate studies with the idea that corn is corn and therefore, focus on determining the most economical planting rate. At Burrus, we know differently. The subtle genetic variations that give rise to different hybrids affect how those hybrids respond to the soil type, maturity zone, and the stress load. Our goal is to give you recommendations that will maximize your yield and allow you to take maximum advantage of your local grain market. We base our corn planting rate recommendations off of data we generate in our research plots. We conduct planting rate testing in different yield environments and maturity zones to determine what planting rate for a given hybrid results in the highest yield without sacrificing plant stand-ability. Since the weather has a huge impact on yield and stand-ability, and because weather conditions can vary drastically from year to year, we base our recommendations off of multiple years of data. Using this approach, we believe that our planting rate recommendations provide you with the best chance of maximizing yield, and therefore profit, in any given year. The recommended planting rates for the Burrus hybrid seed corn can be found in the following chart: