69 RUFFINO | Sustainability Report FY 2021 The handbook sets out operational guidelines that, from preparing the soil for a new system throughout the entire lifecycle of the vineyard, call for the use of agronomic techniques aimed at respecting the environment. The main actions that have been implemented include: • Creating sustainable and lasting vineyards, respecting soil variability and the agricultural landscape; • The reasonable use of chemical products to prevent and treat disease in the vineyard, aimed at gradually reducing these products; • Adopting manure, especially organic manure, aimed at increasing organic substances in the soil, hence increasing soil fertility and impro- ving its structural conditions; • A focus on green manuring, which involving autumnal sowing and the subsequent plan- ting of specific crops that improve the soil structure, enriching it with macro-elements, at the same time reducing chemical fertiliza- tion and preserving the soil against possible erosion by winter rainfall. The handbook should be viewed as a dynamic instrument that is updated regularly to include all the practices that experience, technique and research bring to light, with the aim of increasing the sustainability level in production processes. In line with the gradual adoption of organic culti- vation methods and the extension of best practi- ces to external companies we buy grapes from, the handbook will be updated at the end of 2021 by an internal working group consisting of the Ma- nagement, Estate Managers, the External Grower Manager and the Environmental Manager. As an additional structured and recognized safe- guard, since 2018 all of our agricultural centers have been Biodiversity Friend certified by the World Biodiversity Association.