Extension highlights wheat, corn growth
By David G. Hallauer
Meadowlark Extension District Agent
This year’s Meadowlark Extension District Wheat Variety Plot Tour is scheduled for 9 a.m. June 5 at the farm of Doug and Leonard Edelman located 4.5 miles west of Sabetha on 192nd Road (look for the plot signs).
A northeast area agronomist will be on hand to discuss wheat production practices and the 12 plot entries. Refreshments will be sponsored by the Kansas Wheat Alliance and Syngenta Seeds Cereal Crop Division. Plot assistance is provided by Sabetha Ag Partners Co-op.
Corn growth stages
It seems a good while back when I first wrote about corn growth stages. Finally, we’re seeing some rapid growth.
Up until the V5-V6 growth stage (six leaf collars visible), the growing point remains below ground. That’s important predominantly from the standpoint of early season cold snaps and damage from hail, wind, etc. If that plant gets frozen back, for example, the below ground growing point is protected.
This time frame is important for other reasons as well, particularly as we move forward and start the process of yield determination. One facet of yield determination occurs around V6 with the initiation of tassel and ear development. While it’s not visible (the primary ear is typically located at nodes 12, 13, or 14), the primary ear shoot starts development at V6. Row number is initiated around R7. The number of kernels per row is also kicked off at this time.
Limitations of water and/or nutrients at these stages can severely affect yield. V15 is considered the vegetative stage most sensitive to stress—and it will be here before we know it.