Short‐run net returns to a cereal rye cover crop mix in a midwest corn–soybean rotation

Thompson, Nathanael M.; Armstrong, Shalamar D.; Roth, R.; Ruffatti, Michael D.; Reeling, Carson

doi:10.1002/agj2.20132

Cited by 23 publications

(20 citation statements)

References 36 publications

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“…Pooling across years, 65% of CCs planted before corn and 62% of CCs planted before soybeans were single‐species. The most common single‐species CC was cereal rye ( Secale cereale L.), which has numerous benefits, but also management challenges (Nevins et al., 2020; Rorick & Kladivko, 2017; Thompson et al., 2020). For corn, 24% of CCs were a two to three species mix and 11% had more than four species.…”

Section: Resultsmentioning

confidence: 99%

Farmers employ diverse cover crop management strategies to meet soil health goals

Bowman

Poley²,

McFarland³

2022

Agricultural & Env Letters

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Cover crops (CCs) were used on only ∼5% of harvested cropland in the United States in 2017. Lack of information about effective CC management and the costs and benefits of CCs may contribute to low adoption. We use CC management data from 112 farms in the Soil Health Partnership network (2015–2021) to characterize CC management practices and costs. Soil Health Partnership farmers spent a median of US$98.84 per hectare to plant CCs on trial fields in the 2021 crop year, and costs varied with management practices. Farmers also experimented with CC management practices; more than half of 100 farmers providing panel data used more than one seeding method, and the share “planting green” increased over time. This diversity of CC management practices, heterogeneity in costs (and benefits), and experimentation process—among other factors—may make it challenging for farmers to develop expectations about whether CCs will be profitable on their farm in the short, medium, or long‐run.

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Section: Resultsmentioning

confidence: 99%

Farmers employ diverse cover crop management strategies to meet soil health goals

Bowman

Poley²,

McFarland³

2022

Agricultural & Env Letters

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“…Thus, management of CC should focus on extending the period of growth (i.e., planting and killing dates) to capture more C in the soil. Under this situation, the soil water balance also needs to be considered to reduce the CC impact on soybean yield, and thus, the economic impact of including CC in the sequence (Thompson et al, 2020). The highest correlation between C input and SOC or its fractions was observed in CTS, but almost no correlation between variables was found in FTSL (Table 5).…”

Section: Carbon Dynamicsmentioning

confidence: 99%

Do soil carbon sequestration and soil fertility increase by including a gramineous cover crop in continuous soybean?

Beltrán

Galantini

Salvagiotti³

et al. 2021

Soil Science Soc of Amer J

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Cover cropping is a farming practice that may improve C sequestration and soil fertility, but these effects can vary under different edaphoclimatic conditions. The effects of including a winter gramineous cover crop (CC) in continuous soybeans were evaluated in three long-term experiments (8 yr) on one coarse-textured soil and two finetextured soils in the Pampas region of Argentina. The impacts of CC on soil C sequestration, soil nutrient availability, soil organic C (SOC), and N contents of soil particle size fractions were also determined. The inclusion of CC only increased SOC stock by 3.1 Mg ha -1 in the coarse-textured soil (CTS). The labile C fraction in the 0-5-cm depth increased in both the CTS and the fine-textured soils (FTS) by 263% and 93%, respectively. Soil N also increased in the labile fraction by 119% and 112% when a CC was used in the CTS and FTS soils, respectively. Moreover, the inclusion of a CC decreased soil P availability in one experiment (4.9 kg ha -1 ) and increased soil manganese in two experiments (11 kg ha -1 on average). The inclusion of a gramineous CC in a soybean monoculture increased the C balance, particularly in coarse-textured soils. Considering that soil N was similarly affected, the C/N ratio was not impacted.

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“…This could decrease nutrient losses from runoff and leaching and could provide feed for pollinators [13,15,16]. Despite understanding the various benefits of growing cover crops and increased promotional efforts, cover-crop adoption has been slow [17][18][19]. Lack of attractive short-term economic returns to growers and limited time for cover-crop establishment following maize and soybean harvest are major reasons for slow adoption [17,18,20].…”

Section: Introductionmentioning

confidence: 99%

“…Despite understanding the various benefits of growing cover crops and increased promotional efforts, cover-crop adoption has been slow [17][18][19]. Lack of attractive short-term economic returns to growers and limited time for cover-crop establishment following maize and soybean harvest are major reasons for slow adoption [17,18,20]. Therefore, alternative cover crops and seeding practices are needed to provide immediate economic incentives to growers and extend the time necessary to establish cover crops in maize-soybean production systems.…”

Section: Introductionmentioning

confidence: 99%

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Soil Nitrogen in Response to Interseeded Cover Crops in Maize–Soybean Production Systems

Mohammed

Patel

Matthees³

et al. 2020

Agronomy

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Improved agronomic management strategies are needed to minimize the impact that current maize (Zea mays L.) and soybean (Glycine max (L.) Merr.) production practices have on soil erosion and nutrient losses, especially nitrogen (N). Interseeded cover crops in standing maize and soybean scavenge excess soil N and thus reduce potential N leaching and runoff. The objectives were to determine the impact that pennycress (Thlaspi arvense L.) (PC), winter camelina (Camelina sativa (L.) Crantz) (WC), and winter rye (Secale cereale L.) (WR) cover crops have on soil N, and carbon (C) and N accumulation in cover-crop biomass. The cover crops were interseeded in maize at the R5 growth stage and in soybean at R7 in four replicates over two growing seasons at four locations. Soil and aboveground biomass samples were taken in autumn and spring. Data from the maize and soybean systems were analyzed separately. The results showed that cover crops had no effect on soil NH4+-N under both systems. However, winter rye decreased soil NO3−-N up to 76% compared with no-cover-crop treatment in the soybean system. Pennycress and WC scavenged less soil N than WR. Similarly, N and C accumulation in PC and WC biomass were less than in WR, in part because of their poor growth performance under the interseeding practice. Until PC and WC varieties with improved suitability for interseeding are developed, other agronomic practices may need to be explored for improving N scavenging in maize and soybean cropping systems to reduce nutrient leaching and enhance crop diversification.

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Short‐run net returns to a cereal rye cover crop mix in a midwest corn–soybean rotation

Cited by 23 publications

References 36 publications

Farmers employ diverse cover crop management strategies to meet soil health goals

Farmers employ diverse cover crop management strategies to meet soil health goals

Do soil carbon sequestration and soil fertility increase by including a gramineous cover crop in continuous soybean?

Soil Nitrogen in Response to Interseeded Cover Crops in Maize–Soybean Production Systems

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