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Article

Seeding Rates and Productivity of Broadcast Interseeded Cover Crops

Department of Agronomy & Horticulture, University of Nebraska-Lincoln, Lincoln, NE 68583, USA
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Author to whom correspondence should be addressed.
Both authors contributed equally to this work.
Agronomy 2020, 10(11), 1723; https://doi.org/10.3390/agronomy10111723
Received: 20 October 2020 / Accepted: 3 November 2020 / Published: 6 November 2020
Broadcast interseeding cover crops into corn (Zea mays L.) and soybean (Glycine max (L.) Merr.) instead of drill-planting after harvest extends the cover crop season and improves productivity, but establishment can be insufficient. Our objectives were to find broadcast seeding rates that result in maximum spring biomass and N uptake. We tested cereal rye (Secale cereale L.) and hairy vetch (Vicia villosa Roth) in south-central and eastern Nebraska in 2016–2017 and 2017–2018. Seeding rates for rye were 341, 512, and 682 seeds∙m−2, and 119, 178, and 238 seeds∙m−2 for vetch. We broadcast in late September and terminated by early May. Fall emergence was between 3 and 54% of broadcast seeds, and greater for vetch. When broadcast into corn, rye spring biomass was 1472 kg∙ha−1 with N uptake of 38 kg∙ha−1. Vetch biomass was 361 kg∙ha−1 with 13 kg∙ha−1 N uptake. In soybean, rye produced 2318 kg∙ha−1 with 59 kg N∙ha−1 and vetch produced 535 kg∙ha−1 with 21 kg N∙ha−1. Higher seeding rates increased biomass and N uptake only for rye broadcast into corn. Year and site effects and possibly differences in main crops influenced cover crop productivity. View Full-Text
Keywords: broadcasting; interseeding; cover crops; seeding rates; cereal rye; hairy vetch broadcasting; interseeding; cover crops; seeding rates; cereal rye; hairy vetch
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MDPI and ACS Style

Koehler-Cole, K.; Elmore, R.W. Seeding Rates and Productivity of Broadcast Interseeded Cover Crops. Agronomy 2020, 10, 1723. https://doi.org/10.3390/agronomy10111723

AMA Style

Koehler-Cole K, Elmore RW. Seeding Rates and Productivity of Broadcast Interseeded Cover Crops. Agronomy. 2020; 10(11):1723. https://doi.org/10.3390/agronomy10111723

Chicago/Turabian Style

Koehler-Cole, Katja, and Roger W. Elmore. 2020. "Seeding Rates and Productivity of Broadcast Interseeded Cover Crops" Agronomy 10, no. 11: 1723. https://doi.org/10.3390/agronomy10111723

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