High Yield Management Systems in Corn

Trial Overview

13;10;
  • Many corn production factors are not easily altered so growers must focus on factors that can be changed. Annual production decisions include: soil fertility, seed treatment options, and pest management. 
  • 13;10;
  • With the current market trend, growers are contemplating cutting corn production cost by eliminating or reducing some inputs.
13;10;
13;10;

Research Objective

13;10;
  • The objective of this trial is to help determine the value soil fertility management and crop protection practices bring to farm operations in the face of lower commodity prices.
13;10;
13;10;13;10;13;10;13;10;13;10;13;10;13;10;13;10;13;10;13;10;13;10;13;10;13;10;13;10;13;10;
13;10;Location 13;10;
13;10;Soil Type 13;10;
13;10;Previous Crop 13;10;
13;10;Tillage Type 13;10;
13;10;Planting Date 13;10;
13;10;Harvest Date 13;10;
13;10;Potential Yield 13;10;
13;10;Planting Rate 13;10;
Huxley, IA
Clay Loam
Soybean
Conventional
04/24/2016
10/18/2016
220
35,000
13;10;

13;10; Site Notes:13;10;

13;10;
A 112 relative maturity SmartStax® RIB Complete® corn product was selected for the trial.Eight different treatments evaluated the use of seed treatments, fertilizer, and pesticide applications. Corn products were planted in 30-inch row spacing with 6 rows/treatment.Foliar fungicide and insecticide were applied at VT/R1 growth stage at manufacturers recommended rates. 32% UAN was used for all sidedress applications at V5 (N1) and VT/R1 (N2) growth stages.
13;10;

13;10;
13;10;

Understanding the Results

13;10;
 
13;10;
Table 1. Treatments to evaluate high yield management systems in corn.
1QuickRoots® (Q) cost $6.00/acre; 2Starter Fertilizer (S) cost $12.00/acre; 3Sidedress Nitrogen (N1) cost $17.10/acre; 
13;10;
4360 Y-DROP® Nitrogen (N2) cost $17.10/acre; N1+N2 cost $ 17.10/acre; 5Fungicide and Insecticide application cost $32.00/acre. 
13;10;
  • Nitrogen 360 Y-DROP® was applied at VT to R1 growth stage. 
  • 13;10;
  • Fertility - All treatments received 115 lbs N/acre of anhydrous ammonia in the fall of the previous year.
         -- Treatments A, AQ, AQS, and AQSFI received an additional 60 lbs N/acre of 32% UAN following planting. 
    13;10;
         -- Treatments AQN1 and AQN2 received 105 lbs N/acre of 32% UAN in their respective applications. 
    13;10;
         -- Treatments AQSN1N2 and AQSN1N2FI each received 60 lbs N/acre as sidedress and 45 lbs N/acre as 360 Y-DROP 
    13;10;
            applications. The Climate FieldView™ Nitrogen Monitoring Tool was used to provide N application insight. 
  • 13;10;
  • QuickRoots® and starter fertilizer did not improve yield potential.
  • 13;10;
  • Yield was nearly the same for all fertility treatments.
  • 13;10;
  • Timing of N application had minimal effect on yield potential.
  • 13;10;
  • Yield was nearly the same for the two fungicide and insecticide (FI) treatments.
  • 13;10;
  • Foliar FI improved yield potential: 
         -- FI applications provided ≈12 bu/acre yield increase with a revenue of $37/acre.  (input cost of FI application $32/acre 
    13;10;
            (Table 1); economic return of $5/acre (revenue $37–input cost $32) 
         -- Treatments containing FI applications (AQSFI and AQSN1N2FI) were less economical due to costs of starter fertilizer and 
    13;10;
            sidedress N components (S, N1, and N2) that did not contribute to improved yield potential.
  • 13;10;
  • Acceleron® Seed Applied Solutions ELITE (A) and Acceleron® Seed Applied Solutions ELITE + QuickRoots® (AQ) were the
            most profitable treatments at $753/acre each.
13;10;
13;10;

What Does This Mean for Your Farm

13;10;
  • Yield response to agronomic inputs is highly dependent on the corn product, soil, and environmental conditions during 
        the growing season causing different responses from year to year.
  • 13;10;
  • Early- and mid-season (especially during pollination) stresses have significant negative impacts on yields. 
         -- The FI application was necessary to help protect yields due to a wet spring which predisposed plants to stresses followed 
    13;10;
             by the hot, dry midsummer.
    13;10;
         -- The 112-day corn product responded positively to FI applications with a 12-14 bu/acre yield advantage over the other 
    13;10;
             treatments.
  • 13;10;
  • Corn product did not respond to starter fertilizer application.
         -- Starter fertilizers are most beneficial when planting into cold, wet soils, or when soil fertility is marginal, opposite of the 
    13;10;
            conditions for this trial. 
  • 13;10;
  • QuickRoots® enhances nutrient mineralization and nutrient availability to plants.
         -- QuickRoots may be the reason why the different N rates and timings had minimal effects on yield potential. 
    13;10;
         -- In marginal fertility fields, QuickRoots may be a great input to optimizing yield potential.
13;10;