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Fig. 4. Leaching losses of P and K from soils. Error bars represent the standard deviation. CC1: 20 t ha1 of compost; CC2: 40 t ha1 of compost; CCM1: 20 t ha1 of compost plus 400 kg N ha1 (as NH4NO3); CCM2: 40 t ha1 of compost plus 400 kg N ha1.
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