Soils

• 

  Economic Optimum N Rate Differences

• 

  Yellowing from wet soils and nitrogen deficiency

• 

  Chlorophyll meter

• 

  Chlorophyll meter values and N-rate deviation from optimum rate

• 

  Field of N-deficient corn

• 

  Nitrogren being sidedressed

• 

  High clearance N application

• 

  Soil crusting

• 

  Ponding

• 

  Soil organic matter dynamics

• 

  Wet conditions

• 

  Effect of rotation and N rate on average corn yield

• 

  Effects of rotation and N fertilization on corn yield

• 

  Residue in corn

• 

  Yield response to N with continuous corn vs. rotation

• 

  Nitrogen-deficient corn

• 

  Stalk nitrate concentrationvs difference from EONR - log scale

• 

  Stalk nitrate concentrationvs difference from EONR