Scott Learning Center Research Summaries Highlight - Four Asgrow® Brand Soybean Products to Common Planting Errors

The 2015 demonstration summaries from the Monsanto Learning Center at Scott, MS will soon be available online. Information gathered from the cotton, corn, and soybean demonstrations helps growers identify potential agronomic strategies that may increase on-farm efficiency and profitability. In an effort to help educate growers on different research and field demonstrations being conducted at the Monsanto Learning Center at Scott, MS, demonstration reports will be available along with research demonstrations from previous years.

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Links to Demonstration Reports from 2009 to 2014 can be found at:

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http://www.monsanto.com/products/Pages/scott-learning-center-research.aspx

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Demonstration topics range from The Efficient Use of Irrigation Resources to The Response of Cotton to Population and Plant Growth Regulators.

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Figure 1

Figure 1. Average soybean yield per treatment. Response of Four Asgrow Brand Soybean Products to Common Planting Errors. Monsanto Learning Center at Scott, MS. 2015.

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One demonstration summary that provided some excellent results in 2015 was Response of Four Asgrow Brand Soybean Products to Common Planting Errors.

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Several different issues can lead to planting errors in soybean production. Sometimes, planting failures may not be realized until seedlings emerge. Growers are often concerned about what should be done once planting mistakes are realized. Should they fill in, replant, or leave the crop as is?

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Figure 2

Figure 2. Treatment with one row missing. Response of Four Asgrow Brand Soybean Products to Common Planting Errors. Monsanto Learning Center at Scott, MS. 2015.

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Past research has shown that soybean plants have the ability to adjust growth and development in order to compensate for reduced plant populations. Soybean plants can produce more branches and pods to make up for a reduced population. This study was designed to evaluate the yield response of soybean stands with planting errors of a missing row and either one or two missing twin rows. The results should help guide growers in making decisions about whether to fill in the missing parts of a stand or replant the field. Four Asgrow soybean products with different relative maturities were selected. Treatments in the demonstration included:

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  • A 4-row check plot planted at 145,000 plants/acre.
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  • A 4-row plot with one row missing. (average of 108,750 plants/acre) (Figure 2)
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  • A 4-row plot with one missing twin row of the eight in the 4-row pass. (average of 126,875 plants/acre ) (Figure 3)
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  • A 4-row plot with two separate twins in the pass. (average of 108,750 plants/acre)
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Figure 3

Figure 3. Treatment with missing pair of twin rows. Response of Four Asgrow Brand Soybean Products to Common Planting Errors. Monsanto Learning Center at Scott, MS. 2015.

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Data from this demonstration indicates that soybeans have an incredible ability to compensate for reduced populations, whether the population is spread across the field or caused by missing rows. In comparison to a full population check plot, there was no significant difference in yield observed across any of the reduced population treatments. This demonstration indicates that under resource-unlimited circumstances, it would not be necessary to fill in missing rows or replant areas of a field. However, it should be noted that under dryland conditions or a stressed planting system, there may be limitations in the ability of soybean plants to compensate. It is also important to consider that weed control must be a priority with missing rows as weeds may thrive with reduced canopy closure.

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The information discussed in this report is from a single site, non-replicated demonstration. This informational piece is designed to report the results of this demonstration and is not intended to infer any confirmed trends. Please use this information accordingly.