Assessing climate change impacts on winter cover crop nitrate uptake efficiency on the Coastal Plain of the Chesapeake Bay Watershed using SWAT model

2017 ◽  
Author(s):  
Sangchul Lee ◽  
Ali M. Sadeghi ◽  
In-Young Yeo ◽  
Gregory W. McCarty ◽  
W. Dean Hively ◽  
...  
Keyword(s):  
Climate Change ◽  
Chesapeake Bay ◽  
Coastal Plain ◽  
Cover Crop ◽  
Nitrate Uptake ◽  
Swat Model ◽  
Climate Change Impacts ◽  
Chesapeake Bay Watershed ◽  
Winter Cover Crop ◽  
Winter Cover

Winter Cover Crop and Management Effects on Summer and Annual Nutrient Yields

2006 ◽  
Vol 98 (4) ◽  
pp. 946-950 ◽  
Author(s):  
Dennis E. Rowe ◽  
Timothy E. Fairbrother ◽  
Karamat A. Sistani
Keyword(s):  
Cover Crop ◽  
Winter Cover Crop ◽  
Winter Cover ◽  
Management Effects

scholarly journals Effects of subsurface soil characteristics on wetland-groundwater interaction in the coastal plain of the Chesapeake Bay watershed

2018 ◽  
Vol 33 (2) ◽  
pp. 305-315 ◽  
Author(s):  
Sanghcul Lee ◽  
Gregory W. McCarty ◽  
Glenn E. Moglen ◽  
Megan W. Lang ◽  
Ali M. Sadeghi ◽  
...  
Keyword(s):  
Chesapeake Bay ◽  
Coastal Plain ◽  
Soil Characteristics ◽  
Chesapeake Bay Watershed ◽  
Subsurface Soil

Influence of Winter Cover Crop Mulch on Arthropods in a Reduced Tillage Cucurbit System

2018 ◽  
Vol 47 (2) ◽  
pp. 292-299 ◽  
Author(s):  
Amanda L Buchanan ◽  
Cerruti R R Hooks
Keyword(s):  
Cover Crop ◽  
Reduced Tillage ◽  
Winter Cover Crop ◽  
Winter Cover

scholarly journals Assessing winter cover crop nutrient uptake efficiency using a water quality simulation model

2014 ◽  
Vol 18 (12) ◽  
pp. 5239-5253 ◽  
Author(s):  
I.-Y. Yeo ◽  
S. Lee ◽  
A. M. Sadeghi ◽  
P. C. Beeson ◽  
W. D. Hively ◽  
...  
Keyword(s):  
Water Quality ◽  
Nitrate Leaching ◽  
Cover Crops ◽  
Cover Crop ◽  
Watershed Scale ◽  
Source Areas ◽  
Winter Cover Crop ◽  
Nitrate Export ◽  
Winter Cover ◽  
Winter Cover Crops

Abstract. Winter cover crops are an effective conservation management practice with potential to improve water quality. Throughout the Chesapeake Bay watershed (CBW), which is located in the mid-Atlantic US, winter cover crop use has been emphasized, and federal and state cost-share programs are available to farmers to subsidize the cost of cover crop establishment. The objective of this study was to assess the long-term effect of planting winter cover crops to improve water quality at the watershed scale (~ 50 km2) and to identify critical source areas of high nitrate export. A physically based watershed simulation model, Soil and Water Assessment Tool (SWAT), was calibrated and validated using water quality monitoring data to simulate hydrological processes and agricultural nutrient cycling over the period of 1990–2000. To accurately simulate winter cover crop biomass in relation to growing conditions, a new approach was developed to further calibrate plant growth parameters that control the leaf area development curve using multitemporal satellite-based measurements of species-specific winter cover crop performance. Multiple SWAT scenarios were developed to obtain baseline information on nitrate loading without winter cover crops and to investigate how nitrate loading could change under different winter cover crop planting scenarios, including different species, planting dates, and implementation areas. The simulation results indicate that winter cover crops have a negligible impact on the water budget but significantly reduce nitrate leaching to groundwater and delivery to the waterways. Without winter cover crops, annual nitrate loading from agricultural lands was approximately 14 kg ha−1, but decreased to 4.6–10.1 kg ha−1 with cover crops resulting in a reduction rate of 27–67% at the watershed scale. Rye was the most effective species, with a potential to reduce nitrate leaching by up to 93% with early planting at the field scale. Early planting of cover crops (~ 30 days of additional growing days) was crucial, as it lowered nitrate export by an additional ~ 2 kg ha−1 when compared to late planting scenarios. The effectiveness of cover cropping increased with increasing extent of cover crop implementation. Agricultural fields with well-drained soils and those that were more frequently used to grow corn had a higher potential for nitrate leaching and export to the waterways. This study supports the effective implementation of cover crop programs, in part by helping to target critical pollution source areas for cover crop implementation.

scholarly journals Potential climate-change impacts on the Chesapeake Bay

2010 ◽  
Vol 86 (1) ◽  
pp. 1-20 ◽  
Author(s):  
Raymond G. Najjar ◽  
Christopher R. Pyke ◽  
Mary Beth Adams ◽  
Denise Breitburg ◽  
Carl Hershner ◽  
...  
Keyword(s):  
Climate Change ◽  
Chesapeake Bay ◽  
Climate Change Impacts ◽  
Potential Climate Change
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