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Field trial design requirements for all trials:

Examples

Preplant: Urea 150 lb N/acre vs 120 lb N/acre
Side dress: 28% UAN 20 gal (60 lb N/acre) vs (30 lb N/acre)
Dealer Nitrogen Programs comparisons (Greenseeker, VRT, Adapt N, Climate Corp, 360 Yield Center)

Nitrogen rate additional requirements

  • For best results, only use N sources without additional nutrients in the formulation when applying the different rates. Applications of starter, AMS, MAP, DAP, or blends of products should not be used for the nitrogen rate difference.
  • 30 lb N/acre minimum rate separation
  • No manure or alfalfa history within the past two years for this trial
Nitrogen rate trial

Examples

Preplant: Urea 150 lb N/acre vs 120 lb N/acre
Side dress: 28% UAN 20 gal (60 lb N/acre) vs (30 lb N/acre)
Dealer Nitrogen Programs comparisons (Greenseeker, VRT, Adapt N, Climate Corp, 360 Yield Center)

Nitrogen rate additional requirements

  • For best results, only use N sources without additional nutrients in the formulation when applying the different rates. Applications of starter, AMS, MAP, DAP, or blends of products should not be used for the nitrogen rate difference.
  • 30 lb N/acre minimum rate separation
  • No manure or alfalfa history within the past two years for this trial
No

Examples

Preplant: Urea 60 lb N/acre vs 30 lb N/acre
Side dress: 28% UAN 20 gal (60 lb N/acre) vs 10 gal (30 lb N/acre)
Evaluate first and/or second year manure nitrogen credits

Nitrogen rate after manure additional requirements

  • Use the same commercial nitrogen source applied at a different rate only following manure (30 lb N/acre minimum rate separation)
  • Use the same manure source, rate and application method over the field area
  • Account for manure source, analysis, application rate, and appropriate credits in the Crop Management Form
  • Current manure test for nitrogen should meet current local and state permitted standards