Category Archives: Soybean

Converting Between Mehlich 1 and 3 Soil Test Values for West Tennessee Soils

Most of the commercial and state soil testing laboratories in and around Tennessee use and prescribe fertilizer recommendations based on Mehlich 3 soil test extraction method. Most growers may receive soil test results from laboratories that utilizes Mehlich 3 soil test extraction method. However, The University of Tennessee gives fertilizer recommendations based on the Mehlich 1 extractant. This makes it difficult for growers to take advantage of The University of Tennessee fertilizer recommendations. Currently, the Mehlich 1 and 3 conversion equations used in TN were derived from the University of Kentucky, which were based on Kentucky soils (Table 1). Continue reading

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2023 Top Bean Contest Winners

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Thanks to all the agents and producers who entered the 2023 TN Top Soybean Yield Contest sponsored by Tennessee Soybean Promotion Board.   There were over 50 producers across TN who participated in the 2023 contest.  See the winners below!

For more information, please contact your local County Extension office.  Notice of Intent for the 2024 Yield Contest are due in early September.

Complete contest rules and forms are available at your County Extension Office

 

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Multiple-Herbicide Resistant Waterhemp in Tennessee

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Waterhemp that escaped multiple applications of Engenia + Glyphosate

Last year we reported on waterhemp in Montgomery and Macon counties that was resistant to dicamba.  We came to this conclusion from both research we conducted in the fields and the confirmation of those results by greenhouse research. The greenhouse research was conducted at Purdue University by my colleague Dr. Bill Johnson and his graduate student Claudia Bland. Continue reading

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Soybean Disease Detective: Identifying Soil Borne Diseases

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As most Tennessee soybeans are entering their mid-late reproduction growth stages, some symptoms of diseases caused by soil-borne pathogens may be beginning to show up in our fields, particularly sudden death syndrome this year. The issue with diagnosing diseases caused by soil-borne pathogens is that they often exhibit very similar symptomology to each other. However, there are certain indicators that can help you differentiate between these diseases and help you make the best management decisions moving forward. Continue reading

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A Step Back on Palmer Amaranth Control

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Picture 1. Palmer Amaranth Escapes in Xtend Soybean

Driving across West Tennessee last week it is very apparent we have taken a step backward on Palmer amaranth control.  Many fields that looked clean from the road in late July are now showing large Palmer amaranth escapes. Upon closer inspection the pigweed escapes are at least partially affected by the dicamba applications which resulted in them staying hidden from the road until the last couple of weeks. Continue reading

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Reminder: Soybean Disease Field Day Sept. 12th

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Wondering what’s been making your soybeans sickly? Come to The University of Tennessee Soybean Disease Field Day, held Tuesday, Sept. 12th, at the Milan Research and Education Center. Registration will be from 8:30-9:00 AM with the tour beginning at 9 AM and concluding with a box lunch.  Preregistration is not required. Pesticide re-certification and CCA points will be available. Continue reading

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