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Gregory A. LaBarge on Muck Rack

Gregory A. LaBarge

As seen in: Journal of Environmental Quality
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Articles

Journal of Environmental Quality Abstract - Special Section: The Evolving science of Phosphorus Site Assessment Edge-Of-Field Evaluation of the Ohio Phosphorus Risk Index | Digital Library

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By Gregory A. LaBarge
| Journal of Environmental Quality Verified
The Phosphorus Index (PI) has been the cornerstone for phosphorus (P)-based management and planning over the past twenty years, yet field-scale evaluation of many state PIs has been limited. In this study, P loads measured in surface runoff and tile discharge from 40 agricultural fields in Ohio with prevailing management practices were used to evaluate the Ohio PI. Annual P loads were highly variable among fields (dissolved reactive P: 0.03–4.51 kg ha?1, total P: 0.03–6.88 kg ha?1).
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Phosphorus Availability in Western Lake Erie Basin Drainage Waters: Legacy Evidence across Spatial Scales

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By Heidelberg Univ, Douglas Smith, USDA-ARS Grassland, Gregory A. LaBarge
| Journal of Environmental Quality Verified
The Western Lake Erie Basin (WLEB) was inundated with precipitation during June and July 2015 (two to three times greater than historical averages), which led to significant nutrient loading and the largest in-lake algal bloom on record. Using discharge and concentration data from three spatial scales (0.18–16,000 km2), we contrast the patterns in nitrate (NO –N) and dissolved reactive phosphorus (DRP) concentration dynamics and discuss potential management implications.
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