Update of Corn Nitrogen Recommendations from MRTN

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

 

If you have corn planted after corn or specific price scenarios for your farm, we encourage you to visit Corn Nitrogen Rate Calculator (CNRC) web tool. You can find CRNC at http://cnrc.agron.iastate.edu/. If you need a brief introduction to CNRC, see https://agcrops.osu.edu/newsletter/corn-newsletter/2022-05/using-corn-nitrogen-rate-calculator.

Crop Observation and Recommendation Network

C.O.R.N. Newsletter is a summary of crop observations, related information, and appropriate recommendations for Ohio crop producers and industry. C.O.R.N. Newsletter is produced by the Ohio State University Extension Agronomy Team, state specialists at The Ohio State University and the Ohio Agricultural Research and Development Center (OARDC). C.O.R.N. Newsletter questions are directed to Extension and OARDC state specialists and associates at Ohio State.