Abstract
In agricultural areas with groundwater that is highly sensitive to pollution and surface water resources that are sensitive to groundwater withdrawal, farmers are under pressure from government agencies and environmental groups to improve their on-farm management practices (Kennedy 2015a, 2015b; Marcotty 2012). One area where conflicts over groundwater and agriculture are growing is the central sands region of Minnesota, United States (Gunderson 2014; Haugen 2014; Marcotty 2013; Robertson 2009; Vogel 2014b). This area is characterized by coarse-textured soils formed from glacial outwash (USDA NRCS 2018), a water table that is vulnerable to pollution (Adams 2016), and extensive agricultural production with crops such as corn (Zea mays L.), soybean (Glycine max [L.] Merr.), alfalfa (Medicago sativa L.), wheat (Triticum aestivum L.), oats (Avena sativa L.), potato (Solanum tuberosum L.), and dry edible beans (Phaseolus vulgaris L.) (USDA NASS 2014, 2017).
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