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|
|+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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