Fig. 2
From: White muscle disease in foals: focus on selenium soil content. A case series
Geographical overview of Se content in top soil in Belgium (panel a) and top soil features of importance with respect to Se availability (panels b, c & d). Panel a: Geographical overview of Se content in Flanders. Results on top soil (0–6 cm) of 117 pastures between 2007 and 2015. Analyses with ICP-MS after HNO3-HCl (1:3) extraction. The number in the circles is the number of samples in the municipality. Results of the Soil Service of Belgium. Panels b, c & d: Geographical overview of soil fertility (0–6 cm) of 117 pastures between 2007 and 2015 in Flanders. Analyses of pH-KCl, O.M. with modified Walkley and Black, P-AL with ICP-MS after ammoniumlactaat extraction. Results of the Soil Service of Belgium. The size of the diagram corresponding with 10 samples per municipality is given in the legend