Fig. 5From: A slow release nitrogen fertiliser produced by simultaneous granulation and superheated steam drying of urea with brown coalAmmonium and nitrate concentration in leachates at each leaching event. The column to the far right shows the total N leached. 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 specified time, letters above column are different if the value is significantly different (P < 0.05)Back to article page