Fig. 1From: Mechanism of nutrition activity of a microgranule fertilizer fortified with proteinsChanges in the mean protein concentration with time in the extracts from three soil layers acquired at different distances from the microgranule fortified with the whey protein isolate (soil layer 1: 0–1.5 cm, layer 2: 1.5–3 cm, layer 3: 3–4.5 cm)Back to article page