Update of Corn Nitrogen Recommendations from MRTN

Jun 01, 2022

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

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