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Environmental Sciences Europe
Fig. 6 | Environmental Sciences Europe

Fig. 6

From: Spring waters as an indicator of nitrate and pesticide pollution of rural watercourses from nonpoint sources: results of repeated monitoring campaigns since the early 2000s in the low mountain landscape of Saarland, Germany

Fig. 6

Correlation of nitrate content (median) and share of cropland in the catchment areas of 50 springs for three monitoring periods (circles/solid line = 2018, ×/dotted line = 2011–20112, +/dashed line = 2002)

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