Field-Scale Evaluation of Biosolids-Derived Organomineral Fertilisers Applied to Ryegrass (Lolium perenne L.) in England

Figure 4

Mean soil extractable P over the range of fertiliser application rates used in the experiment. The initial level corresponds to the baseline level prior to the start of the experiment. Use 𝑛=14 except for initial level and control 𝑛=3; 𝑃=0.92 (control versus treatments), 𝑃=0.01 (treatments). The error bars show the LSD value at 5% level.