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Soybean Relative Maturity, Not Row Spacing, Affected Interseeded Cover Crops Biomass

Author

Listed:
  • Hans J. Kandel

    (Department of Plant Sciences, North Dakota State University, Fargo, ND 58104, USA)

  • Dulan P. Samarappuli

    (Department of Plant Sciences, North Dakota State University, Fargo, ND 58104, USA)

  • Kory L. Johnson

    (Department of Plant Sciences, North Dakota State University, Fargo, ND 58104, USA)

  • Marisol T. Berti

    (Department of Plant Sciences, North Dakota State University, Fargo, ND 58104, USA)

Abstract

Adoption of cover crop interseeding in the northwestern Corn Belt in the USA is limited due to inadequate fall moisture for establishment, short growing season, additional costs, and need for adapted winter-hardy species. This study evaluated three cover crop treatments—no cover crop, winter rye ( Secale cereale L.), and winter camelina ( Camelina sativa (L.) Crantz)—which were interseeded at the R6 soybean growth stage, using two different soybean ( Glycine max (L.) Merr.) maturity groups (0.5 vs. 0.9) and two row spacings (30.5 vs. 61 cm). The objective was to evaluate these treatments on cover crop biomass, soil cover, plant density, and soybean yield. Spring wheat ( Triticum aestivum L.) grain yield was also measured the following year. The early-maturing soybean cultivar (0.5 maturity) resulted in increased cover crop biomass and soil cover, with winter rye outperforming winter camelina. However, the early-maturing soybean yielded 2308 kg·ha −1 , significantly less compared with the later maturing cultivar (2445 kg·ha −1 ). Narrow row spacing had higher soybean yield, but row spacing did not affect cover crop growth. Spring wheat should not follow winter rye if rye is terminated right before seeding the wheat. However, wheat planted after winter camelina was no different than when no cover crop was interseeded in soybean. Interseeding cover crops into established soybean is possible, however, cover crop biomass accumulation and soil cover are limited.

Suggested Citation

  • Hans J. Kandel & Dulan P. Samarappuli & Kory L. Johnson & Marisol T. Berti, 2021. "Soybean Relative Maturity, Not Row Spacing, Affected Interseeded Cover Crops Biomass," Agriculture, MDPI, vol. 11(5), pages 1-13, May.
    • Handle: RePEc:gam:jagris:v:11:y:2021:i:5:p:441-:d:553669
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    References listed on IDEAS

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    1. Plastina, Alejandro & Liu, Fangge & Miguez, Fernando E. & Carlson, Sarah, 2018. "Cover Crops Use in Midwestern U.S. Agriculture: Perceived Benefits and Net Returns," ISU General Staff Papers 201804290700001595, Iowa State University, Department of Economics.
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    Cited by:

    1. Inderjot Chahal & Laura L. Van Eerd, 2023. "Do Cover Crops Increase Subsequent Crop Yield in Temperate Climates? A Meta-Analysis," Sustainability, MDPI, vol. 15(8), pages 1-26, April.
    2. Martin Weih & M. Inés Mínguez & Stefano Tavoletti, 2022. "Intercropping Systems for Sustainable Agriculture," Agriculture, MDPI, vol. 12(2), pages 1-4, February.

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