Fig. 5. The N/P ratios of leachates, as total inorganic N and its fractions, for the different treatments used in this study. Both net and cumulative values are shown. Error bars represent the standard deviation. CC1: 20 t ha^–1 of compost; CC2: 40 t ha^–1 of compost; CCM1: 20 t ha^–1 of compost plus 400 kg N ha^–1 (as NH₄NO₃); CCM2: 40 t ha^–1 of compost plus 400 kg N ha^–1.