Emerson Nafziger, Ph.D., professor of crop sciences and extension agronomist at the University of Illinois, highlights the weather patterns that producers saw throughout Illinois and the corresponding effect it had on plant growth and yield. He also speaks about the research conducted at the University of Illinois on various growing factors including tillage, crop rotation, nitrogen applications and row spacing.
The rotation trend has been moving back to the more normal fifty-fifty corn/soybean rotation
The corn-to-soybeans yield ratio has been running as much as 3.5 – 4.0 to 1, but in the last 5 or 6 years it has dropped below 3.5; in 2015 it dropped to 3 to 1 (168 bu corn/58 bu soybeans), which makes soybeans more profitable
The 9+ inches of rain we received in June had more of a negative impact on corn than soybeans, which were able to recover and compensate
Many soybean plants were not at a stage where standing water would have killed them, so yields were still fairly normal at harvest
No-till fields did not generate as high yields
Soybean yield is highest when following more than one year of corn
If you plant soybeans in a field that had soybeans before, expect a 5% lower yield
15-inch rows yielded more than 30-inch rows
Optimal yield was achieved when planted from mid April to mid May
Supplemental nitrogen had a larger impact than usual in 2015
Diseases and insects were not very prevalent during this last growing season
One CEU in Crop Management is available for viewing this webinar.
The Illinois Soybean Association (ISA) checkoff and membership programs represent more than 43,000 soybean farmers in Illinois. The checkoff funds market development, soybean production and government relations efforts, while the membership program, Illinois Soybean Growers (ISG) and the Illinois Soybean Growers PAC actively advocates for positive and impactful legislation for farmers at local, state and national levels. ISA upholds the interests of Illinois soybean farmers through promotion, advocacy, research and education with the vision of becoming a trusted partner of Illinois soybean farmers to ensure their profitability now and for future generations.