Soils

Fall Fertilization for the 2014 Crop

  • October 27, 2013

  • Emerson Nafziger

Corn and soybean harvest continues to move along in Illinois, and as the 2013 crops come off, thoughts turn to fall fertilization. In this article we’ll discuss nutrients other than nitrogen. This will be followed soon by an article on nitrogen.
P and K
In areas with dry soils, we have in recent years had reports of lower than expected soil test K values. There might be some of this in 2013, but we’re also hearing some reports of soil test P and K levels higher than expected.…

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Brownstown Agronomy Research Center Field Day – July 25

  • July 15, 2013

  • Aaron Hager

The 2013 Brownstown Agronomy Research Center Field Day, presented by the University Of Illinois Department Of Crop Sciences, will be held on Thursday, July 25. Extension researchers and specialists will address issues pertinent to the current growing season. Tours will start at 8 a.m., with the second and third groups leaving the headquarters around 8:20 a.m. and 8:40 a.m. The tours will last about two and a half hours and will be followed by lunch provided by U of I Extension.…

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Mark Your Calendars for the 2013 AGMasters Conference

  • May 29, 2013

  • Michael Gray

The 2013 AGMasters Conference will be held at the i Hotel and Conference Center in Champaign, IL on December 2 and 3. The conference will begin with a morning general program followed with 1 1/2 days of specialized sessions. Participants will be able to pick and choose the sessions of most interest to them. These sessions are designed to encourage interaction between instructors and students and cover a broad range of topics including crop production challenges,…

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Supplemental Information about Soil-Residual Herbicides Applied to Emerged Corn

  • May 20, 2013

  • Aaron Hager

The following table provides supplemental information to an article (“Soil-Residual Herbicides Applied to Emerged Corn”) published last week.  Table 1 summarizes information about postemergence applications of more traditional soil-applied corn herbicides.  Please consult the respective product label for additional information.
 
Table 1.  Maximum Corn Size for Postemergence Applications of Soil-Residual Herbicides

Herbicide
Maximum Corn Size for Broadcast Application

Prequel, Princep, Verdict
Before corn emergence

Balance Flexx, Corvus
2 leaf collars

Bullet, Micro-Tech
5 inches

Bicep Lite II Magnum,…

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Determining How Much Nitrogen Is Present

  • May 6, 2013

  • Aaron Hager

Fall Nitrogen
With a still fresh memory of the drought conditions during last year, recent rains have reduced concerns over water availability for the start of the 2013 growing season, but at the same time, concerns over nitrogen (N) loss have increased. Nitrogen loss is difficult to predict because it depends in many factors such as time of N application, type of N source, soil type and temperature, and the amount of precipitation received. While it is difficult to know how much N is lost without a direct analysis of soil N,…

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Spring Soil Nitrogen Following the Drought of 2012

  • April 2, 2013

  • Emerson Nafziger

Last fall, with funding provided through the Illinois Council for Best Management Practices (C-BMP), GROWMARK, C-BMP, and the University of Illinois initiated the N-Watch soil sampling program to see how much inorganic N remained in the soil following the drought of 2012.
Fall sampling revealed fairly high amounts of soil N, with 151 samples statewide averaging 19.5 ppm of nitrate-N in the top foot of soil. We multiply this time 4 to get lb of N per acre,…

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