Open Access
Table 4
Evolution of the use of Decision Support Systems (DSS) to calculate the rate of N fertilizer among cooperatives or trading companies aiming at increasing this use.
| Objective of the cooperatives or trading companies | Number of cooperatives or companies | % of oilseed rape area conducted with a DSS and with an estimation of the biomass by weighing or remote sensing | |
|---|---|---|---|
| 2015/2016 | 2016/2017 | ||
| +10 to +30% in the rapeseed area conducted with the use of a nitrogen DSS and with an estimation of the biomass by weighing or remote sensing | 5 | 53.3 | 50.4 NS |
| Less than +10% in the rapeseed area conducted with the use of a nitrogen DSS and with an estimation of the biomass by weighing or remote sensing | 7 | 38.8 | 30.0 S |
| The objective is not quantified as a % of increase in the total area | 8 | 22.9 | 18.0 NS |
| The objective is not quantified | 5 | 24.1 | 26.7 NS |
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