The OverseerFM analysis provides a long-term stable state analysis of your farm system to allow comparison with different management approaches. If failed crops are common, then incorporating them will provide an accurate picture of the “typical” year. If they are not common, they do not add a useful comparison for assessing potential changes in management practice.
If you are required to include a failed crop in your analysis, how depends on the degree to which the crop failed. The guiding principle is to match crop N uptake with the growth of the crop you observe in the field. The growth rate of a crop can be adjusted by specifying the crop yield. For annual ryegrass crops these can be substituted, for example, with a forage oats crop to specify crop yield. The month the crop ended can be specified in the crop modal. If crop failure is comprehensive, eg. there is no growth, no crop should be represented and the sowing event (yellow tractor) replaced by a cultivation event (brown tractor). The replacement crop would be modelled as per the activities that take place for that particular crop eg cultivation and sowing of the new crop.