Dataset on biomass production of permanent grasslands of the long-term experiment site of Theix in the Massif central (ANAEE-F SOERE ACBB): Plots under mowing with different levels of fertilization supply

Biomass production were carried since 2006 on twelve mown grassland plots under three fertilization levels (NPK, PK, None). Measurements were carried at the three cutting date per year, at field scale with four sampling quadrats per plot. The dataset contains data of the aboveground biomass production, data of fertilizer supply and plots descriptions.