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Soybean Producer Survey (05/04/17)

A Soybean Producer Survey collected data from 829 soybean fields during the 2014-2016 growing seasons. Highlights of the survey are listed.

Soybean Producer Survey

A Soybean Producer Survey collected data from 829 soybean fields during the 2014-2016 growing seasons. Highlights of the survey are listed below:

Previous crop

It is important to rotate crops. As can be seen in Table 1, there is a higher yield potential if soybean is planted after a grass crop (corn or wheat) compared with growing continuous soybean.

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Seed treatments

Averaged across 2014-2016 (Table 2), 77% of the growers used seed treatments and on average had a yield of 40.9 bushels per acre. About 15% of the growers did not use seed treatments and on average had a yield of 39.9 bushels per acre. Approximately 8% of the growers did not report if a chemical seed treatment was used or not.

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Planting date

Averaged across the state of North Dakota (2014-16), planting prior to May 15th resulted in higher yields compared with the survey average of 40.7 bushel per acre (Figure 1). Planting the first week in May (1-6) yielded 46.2 bushel per acre, seeding the 2nd week in May (7-12) averaged 43.4 bushel per acre, and planting later than May 19 yielded less than 39.0 bushel per acre. However, producers will need to consider soil and weather conditions before starting soybean planting. In the northern part of the state, planting soybean will start later than in the southern region. However, the trends in all regions of the state indicate a lower soybean yield when planting is delayed.

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Seeding rate

Eastern North Dakota farmers reported the soybean seeding rate that they used for each field. The highest yield was obtained between 165,000 and 170,000 planted seeds per acre (Figure 2). This will result in approximately 150,000 established plants per acre, assuming that about 10-14% of the seeds will not make it into an established plant.

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Conclusions based on the 2014-2016 soybean grower survey data include:

  1. Growing soybean after corn or wheat in Eastern ND, resulted in up to 2.8 bushel per acre higher yield compared to growing soybean after soybean.
  2. Chemical seed treatments resulted in higher yields in 2014-2016.
  3. Planting soybean before mid‐May, if conditions are favorable, may provide higher soybean yields.
  4. Seeding at 165,000 to 170,000 seeds per acre provided the highest yields in 2014-2016. NDSU is recommending to aim at 150,000 established, evenly distributed plants per acre.

Additional producer surveys for 2014-2016 fields are still being requested, to fill any areas not represented in the dataset. The team is preparing for 2017 in-season field visits. If you would like to participate by contributing survey data, or including your fields in our summer observations, please contact J Stanley at: j.stanley@ndsu.edu or (701) 231-7825.

 

J Stanley

ND Soybean Survey Coordinator

Hans Kandel

NDSU Extension Agronomist

This site is supported in part by the Crop Protection and Pest Management Program [grant no. 2017-70006-27144/accession 1013592] from the USDA National Institute of Food and Agriculture. Any opinions, findings, conclusions, or recommendations expressed are those of the website author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture.

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