The present invention relates to a process for the culture of rape in a plot. This method consists in implementing at least the following successive operations: - a sowing operation of colza grains on said parcel, in combination with a mixture of grains of leguminous plants, consisting of grains of vetch common, the seeds of vetch purple and seeds of a clover leaf of alexandria, - following a phase of implantation of the plants of rapeseed oil and of the plants of leguminous plants from said colza grains and of leguminous plants were sown, and before a phase of flowering plants, rapeseed, a step of determination of the vegetative state of the plants of leguminous plants within said parcel, - in case of the determination of a state that is not destroyed for leguminous plants and before the phase of flowering plants of rape, an operation of the target of leguminous plants, in the maintaining in said parcel.
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