Reduce Clumping in Dry Fertilizer Blends With ESN
Humidity and warm temperatures can cause fertilizer blends to take on moisture over …
All plots were fertilized with a total of 350 lbs N/ac except for the low- and high-rate ESN treatments at emergence. 50 lbs of the total N was applied to the entire trial as ammonium polyphosphate (11-37-0;30 N) at planting and MAP (11-52-0; 20 N) broadcast just prior to hilling. Growers’ practice is 75 lbs N/ac as urea broadcast and incorporated at hilling followed by nine fertigation applications of 25 lbs N/ac each; ESN full rate, ESN low rate, and ESN high rate are broadcast and incorporated at hilling; the low and high-rate ESN treatments were 350 lbs N/ac plus or minus 8% in 2018 and 15% in 2019; ESN + fertigation is 75% of total N (225 lbs N/ac) or 50% of total N (150 lbs N/ac) as ESN broadcast and incorporated at hilling followed by the remainder in three or six, respectively, fertigation applications of 25 lbs N/ac each. Source: Miller Research, Burley, ID.
Potatoes require careful management of relatively high nitrogen (N) rates. They are a shallow-rooted crop often grown under irrigation on sandy soils with potential for nitrogen leaching beyond the root zone. Typical N management usually includes multiple in-season applications to assure proper timing and amounts of N. ESN has repeatedly been shown to produce greater potato yields with fewer applications, reduce N leaching, and increase profits. This Idaho study demonstrates ESN’s value and flexibility in saving applications while producing top yields and profits.
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Humidity and warm temperatures can cause fertilizer blends to take on moisture over …
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