Fig. 2
From: Mechanism of nutrition activity of a microgranule fertilizer fortified with proteins
Changes in the mean excess concentration of \( \mathrm{N}{\mathrm{H}}_4^{+} \) ions with time in the extracts from the soil layer 1 surrounding the microgranule fortified with the whey protein isolate; the concentration of ions in the blank soil sample (without the presence of the microgranule) was subtracted from the concentration measured in the presence of the microgranule