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Fig. 6 | Chemical and Biological Technologies in Agriculture

Fig. 6

From: A slow release nitrogen fertiliser produced by simultaneous granulation and superheated steam drying of urea with brown coal

Fig. 6

Ammonium and nitrate remaining in soil at 42 days, after three leaching events. The depth of the different soil profile layers are top (0–8 cm), middle (8–16 cm) and bottom (18–25 cm). Treatment abbreviations are: U urea, UBC-H urea-brown coal granule (17 % N), UBC-L urea-brown coal granule (8.7 % N), BC brown coal granule, control no N or C addition. Within a profile depth, letters above column are different if the value is significantly different (P < 0.05)

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