All posts by Virginia Sykes, Extension Variety Testing & Agroecology

Cover Crop Variety Trial 2022 report now available

Our 2022 cover crop variety trial results are in! If you are thinking about putting in a cover crop this fall, check out which varieties and mixes did best. Entries were evaluated in both an early and late planted trial (early Oct., early Nov.) and under two termination timings (early Apr., early May). In addition to information on biomass, our report has data on which cover crops provided the best canopy cover throughout the season, estimated nitrogen release to the succeeding cash crop, and forage characteristics for those interested in grazing their covers. 21-22 TN Cover Crop Variety Test Report


2021 Soybean Variety Trials in TN – Now Available

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Results from the 2021 TN soybean variety trials are now available as pdf and excel files at search.utcrops.com/soybean. One hundred ten varieties were evaluated in small plot replicated trials (REC) at nine locations and fifty-seven varieties were evaluated in three to twelve locations as non-replicated large strip plots (CST).  Quality and agronomic traits are reported for the REC trials and disease data are reported for both sets of trials.  A summary of varieties that were in the yield “A group” (not statistically different from the top yield within each test) in either the REC or CST trial can be viewed here 2021 TN Soybean Top-Performers . Links for individual tables and the soybean database will be uploaded soon.


2021 Corn Grain Hybrid Tests in TN – Now Available

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Results from the 2021 TN corn grain hybrid trials are now available at search.utcrops.com/corn-grains. Seventy-one hybrids were evaluated in small plot replicated trials (REC) at seven locations and fifty-four hybrids were evaluated in ten to twenty locations as non-replicated large strip plots (CST).  A summary of hybrids that were in the “A group” (not statistically different from the top yield within each test) in either the REC or CST trial is given below. Continue reading


A new tool for utilizing Mid-South soybean variety trial data

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Which soybean variety is best suited to my region? State variety testing programs provide critical research to help answer that question by evaluating hundreds of soybean varieties every year across multiple locations within a state. But what if we think beyond the bounds of our state borders when it comes to variety evaluation? While a single state alone provides valuable data, our growing regions often cross state lines. A location in West Tennessee may share more similarities to sites in East Arkansas than it does to East Tennessee. By combining variety testing data across multiple states, we can create a more robust dataset that allows us to better predict which varieties are best suited to specific regions and growing conditions. Continue reading


2021 Cover Crop Variety Trials in Tennessee

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As corn and soybean come out of the fields, it’s time to think about planting cover crops. Cover crops offer many benefits to cash crop systems. They can improve soil health and long-term resiliency, suppress weeds, reduce soil and nutrient losses, and provide nitrogen to your subsequent cash crop. However, it is important to remember that not all cover crop species and varieties are created equal. Just like planting a maturity group 0 soybean in Tennessee is not going to maximize your yield, planting a cover crop species or variety that is not regionally adapted is not going to maximize your benefits.

Which cover crop species/varieties will maximize benefits in a Tennessee production system? Over the past two years, we have conducted cover crop variety trials in Tennessee to help answer that question. The latest results from 2020-2021 can be found here. Pdf and excel files from all years are available at https://search.utcrops.com/cover-crops. Continue reading


Mid-South soybean variety testing database survey

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Growing regions often cross state lines but variety test information is typically reported by state. To provide stakeholders with a clearer picture of variety performance, a project is underway to develop a web-based, Mid-South soybean variety testing database that allows end-users to summarize and filter yield, quality, and phenotypic data based on location characteristics that cross multiple states. This research is being performed as a collaborative project with the University of Tennessee, University of Kentucky, Virginia Tech, NC State, and University of Arkansas and is funded by the United Soybean Board. Input from those involved in soybean production (grower, seed industry, Extension, crop advisor) is important for developing a product that best meets the needs of stakeholders. If you are interested in providing input for this research project, the survey can be found at soybeandatabase.questionpro.com (respondents must be 18 or older). If you have any additional questions regarding this project, please contact the lead PI, Dr. Virginia Sykes, at vsykes@utk.edu.


Soybean Herbicide Trait Summary

Herbicide resistant traits available in soybean continue to increase.  It does not seem that long ago that there was either Roundup Ready or conventional soybean.  There are no less than eight different soybean herbicide resistant traits available today with the most recent being XtendFlex soybean.  Continue reading


Soybean Variety Tests in Tennessee 2020 – Publication Available

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The 2020 Tennessee soybean variety trial results have been finalized and are now available. You can access the pdf or excel tables on search.utcrops.com/soybean. Our searchable, sortable online tables and database will be available within a couple of weeks.