Our Insights | Plant Nutrition
July 10, 2018

Copper Deficiency

If you looked at my email sent on July 3rd, you would have noticed that in our high yield soybean fields, Copper is one of the most deficient elements we have been finding.  This was also true last year in our testing.

 

  • Midwest Labs would like to see 13 ppm tissue tests for Copper.
  • Brandt 2018 samples on Cu are 9.84 ppm to date.
  • Brandt 2017 Results were 9 to 10 ppm.

 

A Brandt grower in 2018 was at 8 ppm on Cu.  After an 8oz application of BRANDT Smart Cu his test rose to 22 ppm 1 week later.  Cleary, we have a Cu product in the Brandt portfolio that can erase deficiencies.

https://www.agweb.com/article/two-micronutrients-to-watch-naa-darrell-smith/

High Nighttime Temperatures

High nighttime temperatures (in the 70s or 80s) can result in wasteful respiration and a lower net amount of dry matter accumulation in plants. The rate of respiration of plants increases rapidly as the temperature increases, approximately doubling for each 13° F increase. With high night temperatures more of the sugars produced by photosynthesis during the day are lost; less is available to fill developing kernels or seeds, thereby lowering potential grain yield. High night time temperatures result in faster heat unit (GDD) accumulation that can lead to earlier corn maturation, whereas cool night temperatures result in slower GDD accumulation that can lengthen grain filling and promote greater dry matter accumulation and grain yields.