William G. Crumpton

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The primary objective of this project was to estimate the nitrate reduction that could be achieved using restored wetlands as nitrogen sinks in tile-drained regions of the upper Mississippi River (UMR) and Ohio River basins. This report provides an assessment of nitrate concentrations and loads across the UMR and Ohio River basins and the mass reduction of(More)
  • W G Crumpton
  • 2001
Agricultural applications of fertilizers and pesticides have increased dramatically since the middle 1960s, and agrochemical contamination of surface and groundwater has become a serious environmental concern. Since the mid-1980s, a variety of state and federal programs have been used to promote wetland restoration, and these continuing efforts provide a(More)
It has been hypothesized that wetland restoration policies have favored the restoration of the wettest classes of wetlands on the Des Moines Lobe of the prairie pothole region. To test this hypothesis we compared pre-drainage wetland distributions based on soils data and National Wetland Inventory (NWI) estimates of contemporary wetland distributions on the(More)
e Soil and Water Conservation Club is excited to present Getting into Soil and Water 2011. e purpose of this publication is to educate individuals about soil and water issues ranging from within the state of Iowa to around the world, also to peak interest in natural resource conservation. e Iowa State Soil and Water Conservation Club is grateful to be in an(More)
Rose, Charles Lee, "Effects of emergent vegetation on wetland microbial processes " (1996). Retrospective Theses and Dissertations. This manuscript has been reproduced from the microfilm master. UMI films the text directly fi'om the original or copy submitted. Thus, some thesis and dissertation copies are in typewriter face, while others may be firom any(More)
Nitrate removal capacity of constructed wetlands " (1997). Retrospective Theses and Dissertations. Paper 12024. This manuscript has been reproduced from the microfihn master. UMI fihns the text directly from the origmal or copy submitted. Thus, some thesis and dissertation copies are in typewriter fece, \^^e others may be from any type of computer printer.(More)
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