e-journal

Overcoming Weed Management Challenges in Cover Crop–Based Organic Rotational No-Till Soybean Production in the Eastern United States

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Cover crop–based organic rotational no-till soybean production has attracted attention from farmers, researchers, and other agricultural professionals because of the ability of this new system to enhance soil conservation, reduce labor requirements, and decrease diesel fuel use compared to traditional organic production. This system is based on the use of cereal rye cover crops that are mechanically terminated with a roller-crimper to create in situ mulch that suppresses weeds and promotes soybean growth. In this paper, we report experiments that were conducted over the past decade in the eastern region of the United States on cover crop–based organic rotational no-till soybean production, and we outline current management strategies and future research needs. Our research has focused on maximizing cereal rye spring ground cover and biomass
because of the crucial role this cover crop plays in weed suppression. Soil fertility and cereal rye sowing and termination timing affect biomass production, and these factors can be manipulated to achieve levels greater than 8,000 kg ha-1, a threshold identified for consistent suppression of annual weeds. Manipulating cereal rye seeding rate and seeding method also influences ground cover and weed suppression. In general, weed suppression is species-specific, with early emerging summer annual weeds (e.g., common ragweed), high weed seed bank densities (e.g. > 10,000 seeds m-2), and perennial weeds (e.g.,yellow nutsedge) posing the greatest challenges. Due to the challenges with maximizing cereal rye weed suppression potential, we have also found high-residue cultivation to significantly improve weed control. In addition to cover crop and weed
management, we have made progress with planting equipment and planting density for establishing soybean into a thick
cover crop residue. Our current and future research will focus on integrated multitactic weed management, cultivar selection,
insect pest suppression, and nitrogen management as part of a systems approach to advancing this new production system.

Nomenclature: Common ragweed, Ambrosia artemisiifolia L.; yellow nutsedge, Cyperus esculentus L.; cereal rye, Secale cereale L.; corn, Zea mays L.; soybean, Glycine max (L). Merr.; wheat, Triticum aestivum L.

Key words: Reduced-tillage, organic.

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Ketersediaan

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Informasi Detail

Judul Seri

Weed Technology

No. Panggil

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Penerbit

New York : Weed Science Society America., 2013

Deskripsi Fisik

Weed Technology 2013 27:193–203

Bahasa

English

ISBN/ISSN

DOI: 10.1614/WT-D-12

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

27, January–March 2013

Subjek

PERTANIAN.
ILMU GULMA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

Lampiran Berkas

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