Figure 3: δ15N values of fertilisers applied including the rumen compost and of the tomato plants grown in compost-sand mix (1: 5) under growth chamber conditions (Experiment 1). Cont: δ15N of non-fertilised tomato plants and rumen compost; NCE: Non-aerated compost extract; SACE: Sterilised aerated compost extract Means with different letters indicate significant difference (P < 0.0001) and vertical bars represent the standard error of the mean (n = 3).