Rhizodeposition and turnover of vine roots are responsible for accumulating C and N at depth.

The grass-cover of the vineyard alleys favours the accumulation of stabilised soil organic matter.

In our vineyard soils, fulvic acids represent a degradation product of humic acids.

At depth, fine vine roots have longer turnover times in the grass-covered than in the harrowed vineyard soil.

The vine increases the organic C and total N stock in the deeper layers of vineyard soils.