Figure 3
From: Nitrogen Dynamics in Soil Fertilized with Slow Release Brown Coal-Urea Fertilizers
Average NH4+-N (a) and NO3−-N (b) content of soil profile at the end of incubation (values are mean ± standard error, N = 5). Letters above columns are different if the values are significantly different (P < 0.05). Valid statistical comparisons cannot be made between soil types.
