When studying the effect of ESN on potato performance, the sandy soils of Eastern Idaho make for an ideal location. The ESN team once again worked with Dr. Bryan Hopkins, Ph.D., of Brigham Young University to determine the effect of ESN on potatoes compared to conventional nitrogen sources in a variety of application types, timing, rates and irrigation situations.
Hopkins and his team first measured nitrogen loss through ammonia volatilization and nitrous oxide emissions, evaluating a 2/3 rate ESN against full and 2/3 rate urea. Hopkins found the nitrogen loss of ESN to be less than 5 ppm NH3, almost that of the control (no nitrogen) group, with the full rate urea losses up to 30 ppm and 2/3 rate over 20 ppm. See 11:30 in the video for chart.
The research also evaluated net crop value as a function of N type and timing, comparing urea applied at emergence, split applications of urea, and ESN applied at emergence. Hopkins found ESN to have a $200/ac benefit on Russet Burbank potatoes. See 13:15 in the video for chart.
The research also studied total tuber count and weight, average petiole nitrate and more.
Watch the video above to hear all of Dr. Hopkins’ findings in this study and his analysis through more than 10 years of studying ESN.
To read another study featuring Dr. Hopkins’ findings on ESN’s effect on potato profits, click here.
For questions and comments about ESN, tweet us @SmartNitrogen.