@proceedings {JRN55382,
	title = {Evaluation of water quality benefits of manureshed based manure management in the Susquehanna River Basin},
	year = {2022},
	month = {7/16/2022},
	abstract = {The {\textquoteleft}manureshed{\textquoteright} concept is aimed at generating sustainable manure balanced systems by connecting crop areas (nutrient sinks) with livestock agriculture (nutrient sources). This study aims to quantify the potential water quality benefits derived from manureshed based nutrient management through scenario-based analyses in the Susquehanna River Basin (SRB) using Soil and Water Assessment Tool (SWAT).  Three manure management scenarios were accessed based on the manureshed concept - (i) Baseline scenario assuming minimal manure transportation, manure generated in a HUC-12 is distributed in the same watershed, (ii) Manure Balanced scenario that considers no excess manure application, excess manure in a HUC-12 watershed is transported to nearest available sink watersheds; (iii) Optimized Priority scenario that assumes manure is fully transportable and manure is not applied in vulnerable areas. The manure application rates were estimated considering both N based and P based crop nutrient demands, totaling six manure application scenarios. The crop N demand-based manure application apply excess P and P based application needed supplemental N inorganic fertilizer application to meet crop nutrient demand. Evaluation of manureshed concept-based manure redistribution scenarios indicated a decrease in nutrient loads at the watershed outlet and an improvement in nutrient uptake by the crops.  The N based manure balanced scenario estimated 6\% and 26\% reductions in organic N and nitrate loss, respectively compared with baseline scenario having the same quantity of total manure applied in the watershed. P based manure balanced scenario simulated 4\% reduction in nitrate loss in comparison to the baseline condition. The N and P based optimized scenario simulated 25\% and 15\% reduction in nitrate loss respectively when compared to baseline scenario. For phosphorous, N and P based manure application in manure balanced scenario indicated a reduction of 9\% and 11\% sediment P loss, respectively when compared with the baseline. In optimized priority manure application scenario, the model estimates indicate 12\% and 19\% reduction of sediment P loss from the baseline for both N and P based manure application respectively. The scenario evaluations indicate that the manureshed concept provides an opportunity for sustainable manure management with increased nutrient use efficiency.},
	author = {Amartya Saha and Gourab Saha and Raj Cibin and S. Spiegal and Peter J. A. Kleinman}
}
@proceedings {JRN55372,
	title = {Quantifying the water quality benefits of implementing manureshed concept based manure management in the Susquehanna River Basin},
	year = {2022},
	month = {4/4/2022},
	abstract = {The manureshed concept was developed to address the uneven distribution of manure nutrients in and around livestock operations and recycle manure in areas where crops require nutrients. The implementation of manureshed concept can improve manure nutrient use efficiency and reduce manure nutrient loss to downstream waterbodies. The study aims to quantify the water quality benefits of implementing manureshed concept for nutrient management in the Susquehanna River Basin (SRB) through scenario-based analyses using the Soil and Water Assessment Tool (SWAT). The specific objectives include (i) formulation of manureshed concept-based nutrient redistribution scenarios for the SRB, (ii) evaluation of water quality impacts of manureshed concept-based manure management in SRB both at outlet draining to the Chesapeake Bay and at local streams. Six manureshed concept-based manure redistribution scenarios were formulated for the SRB, which included (i) Crop N demand-based Restricted Manure Transport (BL, Baseline), (ii) Crop N demand-based Manure Balanced (N-MB; manure redistributed to nearby nutrient demand areas), (iii) Crop N demand-based Suitable Soil Transport (N-SST; Manure applied only in suitable areas), (iv) Crop P demand-based Restricted Manure Transport (P-RT), (v) Crop P demand-based Manure Balanced (P-MB), and (vi) Crop P demand-based Suitable Soil Transport (P-SST). Scenario-based analyses demonstrated that the crop P demand-based manure application significantly reduced manure nutrient loss; the P-MB scenario simulated 3\% TN and 25\% TP loss reductions at the SRB outlet compared to the BL scenario. The crop N demand-based manure application simulated a 3-5\% reduction in nutrient loading at the watershed outlet compared to baseline; the N-SST scenario simulated 3\% TN and 4\% TP loss reductions at the SRB outlet. The study results are promising and encourage stakeholders to implement manureshed concept-based manure management in SRB.},
	keywords = {concept based manure management, implementing, manureshed, Susquehanna River Basin, water quality},
	author = {Amartya Saha and Gourab Saha and Raj Cibin and S. Spiegal and Peter J. A. Kleinman and Tamie L. Veith and Charles M. White and Patrick. J. Drohan}
}
