VRT Nitrogen Case Study

In 2017 we conducted a trial using Honeyland Ag Services Staygreen program, variable rate application technology and “I” drops on a highboy sprayer. The goal was to evaluate if there would be any benefit to this approach vs the grower’s normal flat rate.

Notes:

  • We went to the field when the corn was approximately V9-10 and collected samples of both soil and whole plants.
  • Based on the analysis we observed that the nitrogen was much more plentiful in the low areas of the field and the crop demand (determined by whole plant analysis) was relatively even throughout the field.
  • We created a VRT prescription that varied based on the topography of the field, crop demand & soil nitrogen supply. separating the field into knolls, middle ground and valleys. The area that received VRT application was just over 5 acres.
  • The VRT nitrogen was applied in four (summarized as two) test strips and the rest of the field was applied at the grower’s flat rate. Comparing the VRT strips to the swaths directly beside them the results were as follows:
West
VRT 176 Bu
No VRT 170 Bu
East
VRT 190 Bu
No VRT 186 Bu
Farmers No VRT Rate 30 Gal
Honeyland VRT Rate 22.6 Gal
Yield Increase/Decrease 5 Bu
Fert Increase/Decrease -7.4 Gal

By placing nitrogen where it was needed using a variable rate prescription we reduced nitrogen use by 7.4 gallons and increased the yield by 5 bushels. This represents a total gain of approximately $30/acre.

If you are interested in more information about the Staygreen program please visit: http://www.honeylandag.com/staygreen/

Adjusting Nitrogen Rates for Crop Potential

Adjusting N Rates for Crop Potential

The Right Rate of Nitrogen: A Simple Way to Adjust N Rates for Corn Crop Potential

After compiling research from the past two years we know the amount of N that a crop needs is just as variable as the nitrogen in the ground. A field with high yield potential (230+ bu) will need 300+ lbs of N to meet it’s potential. A 200 bushel crop of corn requires about 220 lbs. The key to not running out of “gas” is to know how much you need to get to your destination!

A good rule of thumb is that corn will have 50% of its N out of the ground by V10. If you have 100 lbs removed at V10 your crop will remove approximately 200 lbs.  Last year the best performing field we measured removed 170 lbs by V10!

How do we measure crop potential?
By measuring the amount of N removed from the ground.

When should you measure crop potential?
We can assess how much N your crop will need starting at knee high corn through to tassel and you can use this information to adjust your late N application.

For more information please visit our website – http://www.honeylandag.com/plant-tissue-services/whole-plant-analysis/

The Plant Tissue Tracker

The Plant Tissue Tracker

The Hefty Brothers, Randy Dowdy, and Kip Cullers all use tissue testing to monitor nutrient levels through the growing season. You should too!

We have added a few features to our tissue tracker (pictured above) to make your life easier:
* Nutrients from multiple tissue tests are tracked on an easy to read report.
* Compare more than one zone/field on the same report.
* All data is tracked by GDU to provide a fair comparison between fields planted at different times.
* Average, High, and Low Ranges by GDU are provided for corn.
* Tracking nutrients through the growing season is also available for whole plant analysis. Not sure what whole plant analysis is? Read This: http://www.honeylandag.com/plant-tissue-services/whole-plant-analysis/

For more information on the Plant Tissue Tracker visit: http://www.honeylandag.com/plant-tissue-services/