Rate: 1.3 lbs. / Bu. of yield goal Timing 1/3 or planting 2/3 or sidedress Source/Application method Urea sources may volatilize on surface Inject N-sol or minimize broadcast amount Ammonium nitrate preferred for broadcast Rate: 1.3 lbs. / Bu. of yield goal Timing 1/3 or planting 2/3 or sidedress Source/Application method Urea sources may volatilize on surface Inject N-sol or minimize broadcast amount Ammonium nitrate preferred for broadcast Nitrogen Fertility

V6 V12 Silk Milk Dent P.M % of Uptake Corn Nitrogen Uptake

Sidedress N Placement Fibrous, lateral root system Nitrogen is mobile in soil Avoid root pruning Fibrous, lateral root system Nitrogen is mobile in soil Avoid root pruning Row middle is preferable

Beneficial before tassel Amount dependent on height Corn less than 3 ft: 200 lbs/a Corn taller than 3 ft: lbs/a. Ammonium nitrate is preferred Urea is volatile when broadcast Foliar N = No response Beneficial before tassel Amount dependent on height Corn less than 3 ft: 200 lbs/a Corn taller than 3 ft: lbs/a. Ammonium nitrate is preferred Urea is volatile when broadcast Foliar N = No response Supplemental Nitrogen

Poly vs Orthophosphates % of P as ortho More nitrogen Less expensive % of P as ortho More nitrogen Less expensive Contains K Less corrosive More expensive Contains K Less corrosive More expensive No difference in field studies Starter Fertilizer Sources

Precision is critical Dont plant in the mud Minimal soil temp of 50° F Calibrate and check in the field Lubricate planter and seed Plant 1 ½ - 2 inches deep Drive slow < 5mph Precision is critical Dont plant in the mud Minimal soil temp of 50° F Calibrate and check in the field Lubricate planter and seed Plant 1 ½ - 2 inches deep Drive slow < 5mph Corn Planting Rules

Yield Response to Plant Population Plants per Acre Yield (% of max.)

Dryland Seeding Chart Seeding Rate Seed Spacing (inches)Final Stand 30-inch38-inch40-inch 5% loss10% loss

Irrigated Seeding Chart Seeding Rate Seed Spacing (inches)Final Stand 30-inch38-inch40-inch 5% loss10% loss

VE V6 V12 VT/Silk Milk Dent Mature Corn Physiological Development Apr 1 May 1June 1Aug 1July 1 Drydown Vegetative Stages Reproductive Stages

Corn Nutrient Requirements CropYieldP2O5P2O5 K2OK2OSMg Corn Cotton Soybeans Wheat Dont Guess – Soil Test!