Characteristics and trends of U.S. soybean production practices, costs, and returns since 2002

Vaiknoras, Kate; Hubbs, Todd

doi:10.32747/2023.8023698.ers

Cited by 5 publications

(1 citation statement)

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“…Corn and soybean production dominates the US agricultural landscape [23][24][25]; however, there is limited research on the influence of these crops on soil health in the southeastern US, where cotton production has been dominant until recently. In addition, increasing demand for corn and soybean production for food and biofuel production has intensified crop production in recent years.…”

Section: Introductionmentioning

confidence: 99%

Long-Term Cropping Management Practices Affect the Biochemical Properties of an Alabama Ultisol

Watts,

He,

Yin

et al. 2024

Soil Systems

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Interest in improving the long-term sustainability of agricultural production systems has focused on identifying management practices that promote soil health. No tillage, cover cropping, and amending soils with broiler (Gallus gallus domesticus L.) litter are commonly adopted conservation practices that have been shown to improve soil fertility and crop yield. However, the overall influence of these conservation practices on soil health in the southeastern US are not well understood. Thus, a study was conducted to evaluate the influence of tillage, broiler litter (BL) applications, and cropping systems on soil biochemical properties. Soils were collected from field research plots under long-term management (>than 25 years of tillage, 15 years of broiler litter application, and 15 years of cropping system). Soil microbial biomass, C, N, and P, amidohydrolases, and dissolved organic matter (DOM) were evaluated as indicators of soil health. Adopting tillage and BL into the agricultural management system modified the biochemical parameters of the soils evaluated. Most of these modifications occurred in the 0–5 cm depth. Higher microbial biomass carbon (MBC; 85%) and nitrogen (MBN; 10%) and enzyme activities of asparaginase (65%) and glutaminase (70%) were observed in the 0–5 cm depth under no tillage (NT) compared to conventional tillage (CT), indicating greater biological activities were established in these soil ecosystems. Broiler litter applications increased microbial biomass N and activities of asparaginase and glutaminase in both soil depths. In addition, microbial biomass phosphorus (MBP) was increased following BL application in the 0–5 cm depth. The results suggest that long-term management of NT and BL additions can improve the health of eroded southeastern US soils by altering the soil biochemical parameters.

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Section: Introductionmentioning

confidence: 99%

Long-Term Cropping Management Practices Affect the Biochemical Properties of an Alabama Ultisol

Watts,

He,

Yin

et al. 2024

Soil Systems

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Multiyear productivity and nitrate‐nitrogen loss from corn and prairie bioenergy cropping systems

Liebman,

Helmers

2024

Agronomy Journal

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Though corn (Zea mays L.) and soybean [Glycine max (L.) Merr.] are widely grown and readily accepted into commodity markets and biofuel facilities, heavy reliance on seeds of those two crops for bioenergy production has been linked to environmental degradation, including nutrient discharge to water, and to constraints on food production. Alternative biofuel feedstock systems might better address this “food–energy–environment trilemma.” Using data from a 9‐ha field experiment in Iowa, we evaluated yields from a 14‐year period for four bioenergy feedstock systems: stover harvested from corn grown with and without an unharvested rye cover crop, and prairie vegetation grown with and without fertilizer. We also assessed sub‐surface drainage flows and NO3‐N concentrations and discharges in leachate from those cropping systems. The continuous corn systems produced mean grain yields of 11.0–11.5 Mg ha−1 year−1, while also yielding about 4 Mg ha−1 year−1 of stover. Mean harvested biomass from the fertilized prairie was 83% greater than from the unfertilized prairie and was superior to stover production in the two corn treatments in 11 out of 14 years. Nitrate‐N losses in drainage water from the corn systems averaged 12–14 kg NO3‐N ha−1 year−1, whereas both the fertilized and unfertilized prairie systems almost eliminated NO3‐N loss. Cover cropping with rye reduced NO3‐N loss in only one out of 13 years and had variable effects on corn yield. Adoption of prairie‐based biofuel systems might be driven by placing perennial feedstocks on environmentally sensitive sub‐field areas and by government policies that favor perennial feedstocks over annual crops like corn.

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Evaluating the potential of recycled water use for irrigation in southern Maryland: impact on groundwater conservation and crop yield

Rahman,

Negahban-Azar,

Shirmohammadi

et al. 2024

Water Supply

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Climate change and rainfall variability are driving many farmers to adopt irrigation, who were historically within rain-dependent regions, to sustain crop productivity. In the Mid-Atlantic region, irrigation in agriculture has grown since the 1980s due to rising temperatures and changes in precipitation patterns. Dry summers and uneven seasonal rainfall have necessitated a shift toward irrigation, particularly in Maryland's Coastal Plain. However, high dependence on confined groundwater for irrigation around this area has strained aquifers. To mitigate this strain, exploring alternative water sources is now important. This study investigates the viability of utilizing treated wastewater from plants as an irrigation substitute in Maryland's Coastal Plain. Using the Soil and Water Assessment Tool, the research evaluates crop productivity and irrigation needs under various climate scenarios. Results indicate that recycled water from nearby treatment plants can meet crop water requirements during wet years and partially during moderate and dry years, reducing aquifer reliance by 56 and 30%, respectively. This framework aims to boost yields while conserving freshwater resources. By serving as a decision support tool, stakeholders can assess the feasibility of recycled water for irrigation, thereby potentially reducing strain on confined aquifers.

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Characteristics and trends of U.S. soybean production practices, costs, and returns since 2002

Cited by 5 publications

References 0 publications

Long-Term Cropping Management Practices Affect the Biochemical Properties of an Alabama Ultisol

Long-Term Cropping Management Practices Affect the Biochemical Properties of an Alabama Ultisol

Multiyear productivity and nitrate‐nitrogen loss from corn and prairie bioenergy cropping systems

Evaluating the potential of recycled water use for irrigation in southern Maryland: impact on groundwater conservation and crop yield

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