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Concentrations of nutrients at the water table beneath forage fields receiving seasonal applications of manure, Whatcom County, Washington, autumn 2011–spring 2015 科技报告
报告编号: 70199372, , 2018
作者:  Cox, Stephen E. secox@usgs.gov;  Spanjer, Andrew R. aspanjer@usgs.gov;  Huffman, Raegan L. rhuffman@usgs.gov;  Black, Robert W. rwblack@usgs.gov;  Barbash, Jack E. jbarbash@usgs.gov;  Embertson, Nichole M.
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Preliminary characterization of nitrogen and phosphorus in groundwater discharging to Lake Spokane, northeastern Washington, using stable nitrogen isotopes 科技报告
报告编号: 70168724, 页数: 30, 2016
作者:  Gendaszek, Andrew S. agendasz@usgs.gov;  Cox, Stephen E. secox@usgs.gov;  Spanjer, Andrew R. aspanjer@usgs.gov
Adobe PDF(2990Kb)  |  收藏  |  浏览/下载：2/0  |  提交时间：2019/11/06
Monitoring plant tissue nitrogen isotopes to assess nearshore inputs of nitrogen to Lake Crescent, Olympic National Park, Washington 科技报告
报告编号: 70170302, 页数: 28, 2016
作者:  Cox, Stephen E. secox@usgs.gov;  Moran, Patrick W. pwmoran@usgs.gov;  Huffman, Raegan L. rhuffman@usgs.gov;  Fradkin, Steven C.
Adobe PDF(2652Kb)  |  收藏  |  浏览/下载：38/19  |  提交时间：2019/11/06