Evolution of cultivation practices in cooperatives or companies commited to improvement efforts.
|% of the total area|
|Decision Support System to calculate the rate of N fertilizer by taking into account the biomass at the end of winter|
|No tool is used||10.5||16.4 S|
|Tool with visual estimation of the biomass||28.6||30.4 NS|
|Tool with estimation of the biomass by weighing||36.6||30.0 S|
|Tool with estimation of the biomass by remote sensing||24.3||23.2 NS|
|Difference between the amount of N fertilizer actually applied and the calculated rate within −10 to 10 kg N ha−1||52.5||42.3 S|
|Rapeseed cultivated after a legume preceding crop||2.0||2.9 S|
|Rapeseed cultivated with frost sensitive legumes||1.1||1.9 S|
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