1 / 16

Optimizing Nitrogen Recommendations for Common Crops

Learn about nitrogen recommendations for corn, soybeans, and winter wheat based on soil factors and crop yield potential. Explore guidelines for maximizing economic return through tailored nitrogen application rates.

zena
Download Presentation

Optimizing Nitrogen Recommendations for Common Crops

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Knowing what the Crop Needs

  2. Nitrogen RecommendationsFor Most Situations Corn 120-160 lb/a* Soybeans 0 lb/a Winter Wheat 70 lb/a *Increase by 30 lbs/a if greater than 50% residue

  3. UW Nitrogen Recommendations for Corn Are Based On: Soil yield potential Soil texture (sands vs. others) Soil organic matter content Irrigation - NOT CORN YIELD GOAL -

  4. Corn Nitrogen Recommendations - Prior to 2006 - SoilMedium & Fine Sandy Soils Organic Textured Soils Matter Yield Potential Non-irrigated Irrigated Low/Med. High/V. High - - - % - - -- - - - - - - - lbs N/acre to apply - - - - - - - - < 2 150 180 120 200 2.0-9.9 120 160 110 160 10-20 90 120 100 120 >20 80 80 80 80

  5. Corn yield response to nitrogen

  6. Economic Optimum N Rate =

  7. As N rates are increased to the economic optimum: Economic return increases Crop recovery of N decreases Potential for N loss increases

  8. Price Adjusted N Guidelines for Corn- 2006 Revisions - Maximum Return to N (MRTN) Flexibility in rates based on economics Cost of N Price of corn Cropping systems approach Corn after soybeans, small grains Corn after corn, forage legumes, green manures, etc. Multi-state, regional approach WI, IA, IL, MN, OH, IN, MI New

  9. Price Adjusted N Guidelines for Corn - Medium & Fine-Textured Soils - 1 Maximum return to N (MRTN) rate. 2 Within $1/a of MRTN rate. 3 Total N to apply, includes N in starter, herbicides, etc. 4 Subtract N credits for forage legumes, legume vegetables, animal manures, green manures. 5 Subtract N credits for animal manures and second year forage legumes.

  10. Price Adjusted N Guidelines for Corn - Sandy Soils - 1 Maximum return to N (MRTN) rate. 2 Within $1/a of MRTN rate. 3 Total N to apply, includes N in starter, herbicides, etc. 4 Subtract N credits for forage legumes, legume vegetables, animal manures, green manures.

  11. Range in Profitable N Rates at Various Price Ratios • * = MRTN • = + $1.00 MRTN

  12. Nitrogen:Corn Price Ratios 0.10 0.15 0.20 1 Price of N = [$/ton fertilizer x (100 / % N in fertilizer)] / 2000

  13. Target pH for Common Crops

  14. Crop Nutrient Removal P2O5 K2O - - - - - - - lb/a/yr - - - - - - Corn (160 bu/a) 60 45 Corn silage (23 ton/a) 85 135 Soybean (40 bu/a) 35 40 Alfalfa (5 ton/a) 65 250 Winter Wheat (90 bu/a) 45 32 *recommended application rate

  15. Another way to look at it

More Related