Sorghum Grain Yield
Data are means of 3 sites. All N sources surface broadcast at planting. ESN/urea blend is 50% ESN. All treatments received 20 lbs N/acre in a 2×2 starter. Source: Dr. D. Mengel, Kansas State Univ, Returns are based on ESN premium of $.20 / Lb of N and Sorghum price of $3.50 / bu.
Average 2009 results across 3 sites in Kansas show the benefits of using ESN as the N source for sorghum growers. ESN provided significant financial benefits to the grower vs. the traditional sources of urea and UAN, producing 16 bu/acre more than UAN and 7 bu/acre more than urea.
These yield increases resulted in a 2.0x to 4.7x return to the grower with 100% ESN and a 1.75x to 7x return to the grower using the 50% ESN blend.
