Jim Specht - Emeritus Professor of Agronomy
October 11, 2023
Results of a three-year study investigating the impact of mitigating water stress during soybean reproductive stages on the two components that comprise yield — seed number and seed mass.
October 11, 2023
Learn more about the process of comparing pre-harvest soybean yield estimates with post-harvest yield outcomes.
July 14, 2023
Nebraska Extension educators and specialists share replant recommendations for soybean producers recently affected by hailstorm damage.
If sorghum is at hard dough stage when temperatures dip to 28°F for a period of two hours, it may result in a yield reduction of around 20%.
October 14, 2022
UNL experts weigh in on the potential impacts for replant crops that experienced freezing temperatures Oct. 8 or may be at risk for a freeze this weekend.
Figure 1. Soybean pods collected from stage R7 plants (one mature pod per plant) that were opened to determine if the pod wall interior membrane was still clinging tightly to the seeds (leftmost pod), or if it was beginning to detach from the seeds (second pod), or if the membrane was now permanently attached to the pod wall (third pod). After attaining physiological maturity, seeds undergo a dry-down period from about 60% moisture to about 13% moisture. Note that the Rx.x numbers used here are pod-based stages, not plant-based stages.
August 27, 2021
The timing of the ending R stages in soybean is governed by planting date (PD) and varietal maturity group (MG), though the date of R7 can be hastened if water stress and high temperatures prevail in August — something we are seeing in portions of Nebraska this year.
June 14, 2021
With a continuous decline in seed protein concentration in U.S. soybeans, UNL researchers examined how irrigation practices in Nebraska may contribute to this issue for soybean growers.
May 27, 2021
There are many factors for producers with soybean emergence and stand issues to consider; this article reviews potential causes, identification techniques and management options.
April 14, 2021
Results of ongoing Nebraska Extension field demonstrations to determine critical soil temperatures and trends for soybean germination and emergence, plus early soybean planting considerations.