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simulate reality in any of the four treatments from a statistical point of view. In the following we will use RMSE and Ma in Table 3 and the results shown in Figs. 2–4 to differentiate this general picture.
For four of the five investigated parameters, the barley straw treatment yielded the lowest RMSE of all plant material treatments (Table 3). For mineral nitrogen, RMSE was slightly lower in the
Fig. 4. Time courses of model predicted water insoluble crop residues (DAOM1-C (lines)) and mean measured light particulate organic matter (DLPOM-C\100 mm, r B 1.4 g cm − 3 (symbols)). The figures show the differences (D) between incorporation of 6 and 0 t ha − 1 chopped blue grass, barley straw and maize plants. None of the differences between measured and model predicted were significant (a= 0.05).