High Yield Management Systems in Soybean

Trial Overview

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  • Achieving high yields in soybean production involves effective management of resources including, but not limited to, seed product selection, seeding rate, soil fertility, and eliminating or reducing the impact of plant stressors. 
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  • In some situations soybean has not been managed as intensely as corn, possibly resulting in not reaching maximum yield potential. 
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  • Nearly all corn products on the market have some form of seed treatment; however, estimates indicate only 60 to 70% of soybean products planted in 2014 had a seed treatment applied.
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  • In some locations and years, seed treatments are necessary for protection against seedling diseases and insects.
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  • What are important components of high yield soybean management systems?
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  • Is there an additive effect with each individual management practice contributing to yield potential?
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Research Objective

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  • The objective of the study is to evaluate the effect of various inputs contribution to increasing soybean yield potential and maximizing net economic return.
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Location
Soil Type
Previous Crop
Tillage Type
Planting Date
Harvest Date
Potential Yield
Planting Rate
Huxkey, IA
Clay loam
Corn
Conventional
05/06/2016
10/18/2016
60 to 65 bu/acre
150,000 seeds
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Site Notes:

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The same 2.8 maturity group seed product was planted in 30-inch rows for all treatments.The study consisted of basic management inputs with additional inputs being added for each treatment.Subsequent treatments included the previous treatment plus an additional treatment resulting in a “building block�? approach of treatments. The study had 5 randomized treatments and 2 replications.Each treatment contained 6 rows and was 200 feet in length. Treatment 1 (A) - Acceleron® Seed Applied Solutions STANDARD                                                                                           - a fungicide and insecticide seed treatment. Treatment 2 (AS) - plus starter fertilizer                                                                                                                                              - 3 gal/acre of an 8-24-0 starter fertilizer was applied at planting using Trimble® Field-IQ™ delivery system. Treatment 3 (AST) - plus TagTeam® LCO XC                                                                                                                                       - Seed treatment containing a rhizobia strain for increased nitrogen (N) fixation, Penicillium bilaiae for improved phosphorus (P) availability, and LCO for improved nodule formation. Treatment 4 (ASTFI) - plus fungicide and insecticide foliar application                                                                             - Fungicide and insecticide were tank-mixed at manufacturer’s recommended rates and applied during R3 (beginning pod) growth stage with a bean buggy sprayer. Treatment 5 (ASTFIN) - plus in-season N application                                                                                                                              - 40 lbs N/acre of 32% UAN was side-dressed during R2 (full flowering) growth stage using a high-clearance Avenger sprayer equipped with 360 Y-DROP®.
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Understanding the Results

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Table 1. Treatment Summary
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Figure 1. Effects of management practices on yield and profitability of soybean.
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  • Under these conditions, adding treatments of seed applied TagTeam® LCO XC, foliar applied fungicide/insecticide, and side-dressed nitrogen as cumulative treatments resulted in progressive yield increas
     
     
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  • As yields increased with the addition of input treatments, gross income minus treatment costs increased as well, except for the starter fertilizer treatment. 
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  • Under these research conditions, starter fertilizer treatment (AS) had minimal yield effect and provided the same economic return as the base treatment (A). 
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What Does This Mean for Your Farm

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  • Generally, starter fertilizer is not recommended when planting soybean and was confirmed under these research conditions.
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  • TagTeam® LCO XC may increase nitrogen fixation, improve nodule formation, and improve phosphorus availability. This seed treatment may also increase yield potential, especially on rotated fields.
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  • The foliar-applied fungicide and insecticide application was profitable under these research conditions. If diseases and insects are usually present in your fields, scout fields  on a regular basis. 
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  • Applying different foliar treatments in one application can optimize application costs and maximize economic gains.
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  • Nitrogen fertilizer application is generally not needed in soybean. However, in high-yielding environments there may be a positive yield response.
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