By Greg LaBarge
This article provides an updated Maximum Return to Nitrogen Rate recommendation table for corn planted after soybean. Table 1 and 2 were previously published in the 2021 CORN newsletter https://agcrops.osu.edu/newsletter/corn-newsletter/2021-39/implications-high-n-fertilizer-prices-corn-n-fertilizer. There are a couple of changes to note with these revised tables. First, due to continued concerns about nitrogen source availability, urea was added to the source list for Table 1 to provide per unit N prices. In addition, Table 2 nitrogen rate quick lookup table is updated to reflect new data in the Corn Nitrogen Rate Calculator tool. The database for soybean-corn and corn-corn rotations now includes trials through 2021.
Table 1. Price per Ton of Anhydrous and 28% UAN at Various Price per Pound of Nitrogen Fertilizer Costs (Updated 5/23/2022).
Price of Nitrogen Fertilizer ($/lb)
|
N Source | $0.65 | $0.75 | $0.85 | $0.95 | $1.05 | $1.15 |
82-0-0 | $1066 | $1230 | $1394 | $1558 | $1722 | $1886 |
28-0-0 | $364 | $420 | $476 | $532 | $588 | $644 |
45-0-0 | $585 | $675 | $765 | $855 | $945 | $1035 |
Table 2. Ohio MRTN recommended Nitrogen Rates (lbs nitrogen/acre) for Corn following Soybean based on the Price of Corn Grain and Nitrogen Fertilizer (Updated 5/23/2022).
Price of Nitrogen Fertilizer ($/lb)
|
Price/Bushel Corn | $0.65 | $0.75 | $0.85 | $0.95 | $1.05 | $1.15 |
$5.50 | 173 | 165 | 158 | 151 | 145 | 139 |
$6.00 | 178 | 170 | 163 | 156 | 150 | 144 |
$6.50 | 182 | 175 | 168 | 161 | 155 | 149 |
$7.00 | 185 | 178 | 172 | 165 | 159 | 154 |
$7.50 | 189 | 182 | 176 | 169 | 163 | 158 |
Source : osu.edu