Conservation tillage increases corn and soybean water productivity across the Ohio River Basin

Huang, Yitao; Tao, Bo; Lee, Seonjoo; Yang, Yongchun; Liang, Liang; Wang, Lixin; Jacinthe, Pierre-André; Tian, Hanqin; Ren, Wei

doi:10.1016/j.agwat.2021.106962

Cited by 26 publications

(11 citation statements)

References 74 publications

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“…From the water-centered publications, one establishes a water-energy nexus by analyzing the effects of climate change on the hydroecological conditions and natural hazard risk (Yang et al, 2019 ). Another publication establishes a water-food nexus by analyzing the effects of conservation tillage used in corn-soybean on crop water productivity (Huang et al, 2021 ). Publications from this research project (Auburn University) are related either to nitrous oxide quantification (Tian et al, 2020a , b ; Yao et al, 2020 ; Bian et al, 2021 ) or to evapotranspiration (Pan et al, 2020 ).…”

Section: Analysis and Discussion Of Findingsmentioning

confidence: 99%

Scientific diasporas and the advancement of science diplomacy: The InFEWS US-China program in the face of confrontational “America First” diplomacy

Prieto

Scott

2022

Front. Res. Metr. Anal.

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The challenges and consequences of climate change have brought together governments around the world to advance scientific knowledge and programmatic actions to develop mitigation strategies while promoting sustainable development. The United States and China—the countries with the highest science expenditures globally—have historically developed a range of joint international research collaborations. However, under the “America First” agenda put forth by the Trump Administration, bilateral diplomatic relations with China reached their highest confrontational peak. Under this scenario science diplomacy served as a catalyst to maintain scientific collaborations between both countries. In 2018, the US National Science Foundation and the China National Natural Science Foundation launched the InFEWS US-China program to promote collaborations to expand food, energy, and water nexus (FEW Nexus) research and applications. Over the past four years, 20 research projects have been awarded from the US side and 47 publications have been reported as research output. By carrying out a descriptive analysis of the InFEWS US-China research and scholarly outputs, we find evidence of the crucial role played by the Chinese scientific diaspora who led 65% of the projects awarded. We find that there is a generally good understanding of the interdependencies between FEW systems included in the project abstracts. However, in the InFEWS US-China scholarly outputs generated to date, there is a lack of usage of a clear FEW Nexus theoretical framework. Further research should address intentional policies that enhance the involvement of scientific diasporas in their home countries to better address climate, sustainability, and development challenges.

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Section: Analysis and Discussion Of Findingsmentioning

confidence: 99%

Scientific diasporas and the advancement of science diplomacy: The InFEWS US-China program in the face of confrontational “America First” diplomacy

Prieto

Scott

2022

Front. Res. Metr. Anal.

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“…Alfisols dominate soil order across most of the basin due to the humid temperate climate and predominance of deciduous forests during the Holocene (Huang et al, 2021). The northern half of the basin is near the glacial margin during the Late Pleistocene.…”

Section: Methodsmentioning

confidence: 99%

Instream sensor results suggest soil–plant processes produce three distinct seasonal patterns of nitrate concentrations in the Ohio River Basin

Gerlitz

Fox

Ford

et al. 2023

J American Water Resour Assoc

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The Ohio River Basin (ORB) is responsible for 35% of total nitrate loading to the Gulf of Mexico yet controls on nitrate timing require investigation. We used a set of submersible ultraviolet nitrate analyzers located at 13 stations across the ORB to examine nitrate loading and seasonality. Observed nitrate concentrations ranged from 0.3 to 2.8 mg L −1 N in the Ohio River's mainstem. The Ohio River experiences a greater than fivefold increase in annual nitrate load from the upper basin to the river's junction with the Mississippi River (74-415 Gg year −1 ). The nitrate load increase corresponds with the greater drainage area, a 50% increase in average annual nitrate concentration, and a shift in land cover across the drainage area from 5% cropland in the upper basin to 19% cropland at the Ohio River's junction with the Mississippi River. Time-series decomposition of nitrate concentration and nitrate load showed peaks centered in January and June for 85% of subbasin-year combinations and nitrate lows in summer and fall.Seasonal patterns of the terrestrial system, including winter dormancy, spring planting, and summer and fall growing-harvest seasons, are suggested to control nitrate timing in the Ohio River as opposed to controls by river discharge and internal cycling.The dormant season from December to March carries 51% of the ORB's nitrate load, and nitrate delivery is high across all subbasins analyzed, regardless of land cover. This season is characterized by soil nitrate leaching likely from mineralization of soil organic matter and release of legacy nitrogen. Nitrate experiences fast transit to the river owing to the ORB's mature karst geology in the south and tile drainage in the northwest. The planting season from April to June carries 26% of the ORB's nitrate and is a period of fertilizer delivery from upland corn and soybean agriculture to streams. The harvest season from July to November carries 22% of the ORB's nitrate and is a time of nitrate retention on the landscape. We discuss nutrient management in the ORB including fertilizer efficiency, cover crops, and nitrate retention using constructed measures.

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“…According to observations of eddy covariance (EC) flux sites, Wang et al (2018) also suggested maize cropland had the highest ecosystem WUE, followed by winter wheat, soybean and paddy rice. In addition, many researchers paid much attention to the changes of WP (or WUE) under different agronomic practices (e.g., deficit irrigation, conservation soil tillage, plastic film mulching, cropping patterns changing and so on) in order to get more crop per drop (Cheng et al, 2021;Davis et al, 2018;Firouzabadi et al, 2021;Hatfield et al, 2001;Huang et al, 2021;Xue et al, 2021). However, these abovementioned studies are mostly confined at the field scale and for single crop, spatial variations of cropland WP still remain poor understood in China, especially for different cropping systems and agricultural regions.…”

Section: Introductionmentioning

confidence: 99%

“…With new development of remote sensing (RS) technology and the increase of free and open access of satellite imagery, RS-based ecosystem models provide powerful tools to monitor cropland WP (or WUE) dynamics at regional and global scales, and they have been increasingly used for cropland WP and WUE analyses in the past few years (Ai et al, 2020;Blatchford et al, 2020;Jin et al, 2018;Li et al, 2021;Liu et al, 2021b;Liu and Song, 2020;Zhang et al, 2021). Huang et al (2021) used an improved process-based agroecosystem model (DLEM-Ag) to quantify the effects of conservation tillage on crop WP of corn and soybean across the Ohio River Basin, and found conservation tillage could enhance crop WP owning to the reductions of ET. Based on Moderate Resolution Imaging Spectroradiometer (MODIS) products (e.g., MODIS GPP and ET), Ai et al (2020) demonstrated irrigated croplands had lower WUE values than rainfed croplands at the global scale.…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal variations of water productivity for cropland and driving factors over China during 2001–2015

Yang

Zhang

Wang

et al. 2022

Agricultural Water Management

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Conservation tillage increases corn and soybean water productivity across the Ohio River Basin

Cited by 26 publications

References 74 publications

Scientific diasporas and the advancement of science diplomacy: The InFEWS US-China program in the face of confrontational “America First” diplomacy

Scientific diasporas and the advancement of science diplomacy: The InFEWS US-China program in the face of confrontational “America First” diplomacy

Instream sensor results suggest soil–plant processes produce three distinct seasonal patterns of nitrate concentrations in the Ohio River Basin

Spatiotemporal variations of water productivity for cropland and driving factors over China during 2001–2015

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