Category Archives: Fertility

18 Feb 2025

Does Soil Test Phosphorus and Potassium Values from Haney Soil Health Test (H3A-4) Translate to Mehlich-3?

18 Feb 2025
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More recently, with emphasis on sustainable crop production, there are a number of tests that assess soil health. Some of the soil health tests such as the Haney Soil Health Tool (HSHT), which is adopted by USDA-NRCS, assess soil quality parameters as well as nutrient availability. The HSHT uses the H3A-4 extractant to estimate ‘plant available’ nutrients. The H3A-4 extractant simulates plant root environment by using organic acid plant exudates and has been touted as more representative of phosphorus availability. Some commercial soil testing laboratories offer HSHT and provide corresponding fertilizer recommendations. How does the test values and recommendations from H3A-4 relate to Mehlich-3 extraction? Publicly available information relating H3A-4 to Mehlich-3 extractable nutrients is limited. Continue reading →

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14 Nov 2024

Post-harvest soil fertility consideration

14 Nov 2024
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Play podcast

In this podcast episode, Dr. Nutifafa Adotey and Dr. Jake McNeal addresses post-harvest soil and nutrient management questions sent in by local UT Extension agents.

You can learn more in the publications on estimating supplemental nitrogen following extended flooding and urease inhibitors, as referenced in the episode.

Check back soon for more segments covering topics related to soil and row crop agriculture!

 

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27 Jun 2024

2024 UT Soybean Scout Schools

27 Jun 2024
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UT’s Soybean Scout Schools will be held in July (see details below). These field-side programs cover the basics of soybean growth, scouting, pest identification, and general management. Pesticide recertification and CCA CEU points will be available. Scout Schools are offered free of charge with sponsorship from the Tennessee Soybean Promotion Board. Registration is not required. Participants will receive a scouting notebook and a sweep net while supplies last.

 West TN – Madison County, July 15th, 9:00 AM – 11:30 AM. This school will be at the West TN Research and Education Center, 605 Airways Blvd. Jackson TN, 38301. Signs will be up at the station to direct you to the field.

2024 Franklin County Soybean Scout School
2024 Franklin County Soybean Scout School

Middle TN – Franklin County, July 16th, 9:00 AM – 12:00 PM. This school will be at 601 Cumberland St., Cowan TN 37318. Contact Matthew Deist for more information. 931-967-2741, mdeist@utk.edu. Register online at https://tiny.utk.edu/SoybeanScoutSchool

West TN–  Obion County, July 17th, 9:00 AM – 11:30 AM. This school will be held at the Obion Farmers Coop,  810 Mt. Zion Rd Union City, TN 38261. Contact Garrett McDaniel for more information gartmcda@utk.edu, 731-223-1178.

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08 May 2024

Cotton Scout School (May 21, 2024)

08 May 2024
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The UT Cotton Scout School is scheduled for Tuesday, May 21st, at the West Tennessee Research and Education Center (605 Airways Blvd, Jackson). There is no fee, and preregistration is not required. Registration begins at 8:00 AM with the program starting at 8:30. Pesticide points in categories 1, 4, 10 and 12 will be offered and a BBQ lunch will be provided. Content will include classroom and hands-on training with an optional go-to-the-field session after lunch. Topics covered will include cotton development and identification and symptoms of insect pests, plant diseases, and weeds.

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21 Feb 2024

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

21 Feb 2024
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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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11 Jul 2023
Middle Tennessee Soybean Scout School

UT Soybean Scout Schools

11 Jul 2023
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UT’s Soybean Scout Schools will be held in July (see details below). These field-side programs cover the basics of soybean growth, scouting, pest identification, and general management. Three Pesticide recertification and CCA CEU points will be available. Scout Schools are offered free of charge with sponsorship from the Tennessee Soybean Promotion Board. Registration is not required. Participants will receive a scouting notebook and a sweep net while supplies last.

 West TN – Madison County, July 17th, 9:00 AM – 11:30 AM. This school will be at the West TN Research and Education Center, 605 Airways Blvd. Jackson TN, 38301. Signs will be up at the station to direct you to the field.

Middle Tennessee Soybean Scout School
Middle Tennessee Soybean Scout School

Middle TN – Coffee County, July 18th, 9:00 AM – 11:30 AM. This school will be at Graham Farms,8141 Woodbury Hwy., Manchester, TN. Please contact Amy Willis Prince of the UT Coffee County Extension Office at 931-723-5141 or awillis2@utk.edu if you plan to attend.

 

 

 

East Tennessee Soybean Scout School
East Tennessee Soybean Scout School

East TN –  Monroe County, July 19th, 9:00 AM – 11:30 AM. This school will be held at the  Monroe County Farm Bureau Office 501 Main Street, Madisonville, TN 37354.  Lunch will be provided. A head count is required for the meal, please contact Jonathan Rhea of the UT Monroe County Extension Office at 423-442-2433 or jrhea@utk.edu if you plan to attend.

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16 May 2023

Corn and Soybean Tolerance to Flooding and Submergence

16 May 2023
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Excessive rainfall over the weekend (5/12 and 5/13) in the North Western river counties has resulted in several calls this week concerning flooding and standing water in corn and to a lesser extent in soybean. Crop response will depend on the length of time the crop remains submerged and varies between corn and soybean. With rain still in the forecast for the next few days, here are a few agronomic considerations to be aware of. Continue reading →

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