Crops Insights Technology

ANVOL with DUROMIDE provides extended nitrogen protection


Many challenges can arise throughout a growing season, from bad weather to loss of costly inputs. While retailers may not be able to control the weather, they can help growers increase efficiency by using emerging technologies to mitigate nutrient loss associated with weather variability.

ANVOL™ nitrogen stabilizer from Koch Agronomic Services (Koch) is now available to growers. When compared to other urease inhibitor technologies, this next-generation stabilizer provides the longest-lasting protection against ammonia volatilization, thanks to an optimal amount of dual active ingredients — DUROMIDE™ and NBPT.

DUROMIDE Receives EPA Registration

DUROMIDE, now registered by the EPA for use during the 2019 growing season, is a patented active ingredient that provides efficacy beyond the window of protection offered by NBPT alone. While active ingredient NBPT can quickly block the hydrolysis of urea, it eventually degrades, leaving remaining urea vulnerable to volatilization. DUROMIDE delivers urease inhibition for a longer period of time, giving growers a better return on their fertilizer investment.

“This extra protection can make a tremendous difference for growers who don’t experience adequate rainfall or aren’t able to mechanically incorporate their fertilizer after application,” says Greg Schwab, director of agronomy for Koch. “We’re excited that our DUROMIDE technology is now available in our latest product, ANVOL. It gives retailers an effective tool to help growers better protect their nitrogen against volatilization losses.”

DUROMIDE is a sturdy molecule, meaning it can:

  • deliver protection in a wide range of soil environments and fertilizer blends;
  • slow urea hydrolysis over a long window of time;
  • allow more time for incorporation into the soil, reducing ammonia loss.

Research Shows Higher Yields For ANVOL

When left unprotected, the nitrogen contained in urea and UAN can escape the soil throught ammonia volatilization. In a 2016-2018 study across eight site years1 with locations in Virginia, Kentucky, Illinois and Tennessee, results showed that ANVOL treated urea reduced nitrogen loss and boosted corn yields by an average of 31 bushels per acre compared to untreated urea.2

Additionally, Louisiana State University professor Dustin Harrell, Ph.D., tested untreated urea, urea treated with NBPT and urea treated with ANVOL fertilizer featuring the active ingredient DUROMIDE. He found ANVOL containing DUROMIDE performed better than untreated urea and urea containing NBPT alone on a low pH soil.3

“I tested each of the three urea fertilizers on a more acidic soil with a pH of around 5.5,” says Harrell. “I evaluated the fertilizers in our lab’s environmentally controlled cabinets, where I can regulate air flow and temperature, and I measured and recorded each fertilizer’s volatilization rate.”

Harrell’s LSU rice trial resulted in urea treated with ANVOL outperforming all other treatments, with ANVOL reducing cumulative ammonia loss to 12 percent compared to losses of more than 30 percent with untreated urea.

anvol nitrogen loss

“Over the years, published research has shown that NBPT typically breaks down faster in acidic soils,” says Harrell. “In my tests, ANVOL’s DUROMIDE provided increased nitrogen protection over NBPT, which will provide growers improved protection over a longer period of time.”

Retailers will find that the dual active ingredients in ANVOL contribute to a high active ingredient concentration and a low application rate, allowing for:

  • more efficient coating operations across a wide variety of impregnation methods;
  • reduced fertilizer buildup on equipment by providing a drier urea fertilizer blend;
  • improved operational efficiencies, saving growers time and labor costs.

“Because ANVOL contains DUROMIDE,” says Schwab, the Koch agronomist, “Growers can rest easy knowing they are using not only an effective product, but an efficient one.”


1Based on sites responsive to nitrogen fertilizer and where losses to volatilization were a significant factor. The underlying data was provided by ‬‬‬2‭Virginia Tech, University of Kentucky, University of Tennessee, University of Illinois and Pike Ag, LLC and 3‭Louisiana State University‬‬‬‬‬ under Research Trial Financial Support Agreements with Koch Agronomic Services, LLC. Neither these institutions, nor the individual researchers referenced, endorse or recommend any product or service.‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬

ANVOL™ and DUROMIDE™ are trademarks of Koch Agronomic Services, LLC. in the United States. Koch is a trademark of Koch Industries, Inc. © 2019 Koch Agronomic Services, LLC.


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