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Full-Text Articles in Engineering
On-Farm Research And Student Engagement To Assess And Promote The Use Of Organic Amendments To Improve Agricultural Soil Health And Resilience Of Crop Production Systems In Nebraska, Agustin Jose Olivo
Department of Biological Systems Engineering: Dissertations and Theses
In nearly every production environment, there are opportunities to capture profits if waste streams can be further processed or enhanced to create “value added” products. On-farm research studies were initiated in 2019 at four locations across Nebraska to assess the impacts of livestock manure, cedar mulch from forestry management and coal char from sugar beet processing, on agricultural cropland. Study treatments included beef cattle manure (CM), beef cattle slurry (CS), coal char (CC), woody biomass (WB) CM+WB, CS+WB, CM+CC and control (CON; no organic amendment). Soil properties and corn yield were evaluated after a single growing season. Results indicate that …
Risk And Cost Assessment Of Nitrate Contamination In Domestic Wells, Pongpun Juntakut, Erin M.K. Haacker, Daniel D. Snow, Chittaranjan Ray
Risk And Cost Assessment Of Nitrate Contamination In Domestic Wells, Pongpun Juntakut, Erin M.K. Haacker, Daniel D. Snow, Chittaranjan Ray
Daugherty Water for Food Global Institute: Faculty Publications
This study combines empirical predictive and economics models to estimate the cost of remediation for domestic wells exceeding suggested treatment thresholds for nitrates. A multiple logistic regression model predicted the probability of well contamination by nitrate, and a life cycle costing methodology was used to estimate costs of nitrate contamination in groundwater in two areas of Nebraska. In south-central Nebraska, 37% of wells were estimated to be at risk of exceeding a threshold of 7.5 mg/L as N, and 17% were at risk of exceeding 10 mg/L as N, the legal limit for human consumption in the United States. In …