The project complies with Latvia’s smart specialisation strategy (RIS) in the field of knowledge-intensive bioeconomy, and research promotes the development of scientific and human capital and creation of new knowledge, and it will be carried out in the field of research (NACE classification NACE code 72.19) and forestry (02.10, 02.20, 02.40). The project is designed as an industrial research, and all the activities carried out correspond to the agricultural sector. The study is interdisciplinary and will be carried out in cooperation between forestry and environmental science specialists (OECD “Frascati Handbook” 4.1. and 1.5.). The study according to Regulation No. 34 of the Cabinet of Ministers is not related to economic activity (outside the main activity) and is carried out on the basis of Section 21.1 – project, which is implemented individually by research organisation, in the framework of which independent research to acquire more knowledge and better understanding is carried out. The activities carried out shall include research and the transfer of research results using knowledge and technology, without exclusivity and discrimination. The scientific objective “to develop innovative solutions and technologies to create sustainable White Willow – agro-forestry systems for perennial grasslands aimed at restoring marginal areas of acid mineral soils to the bio-economy by using soil improvers of organic origin – peat production by-products and wood ash” will implement a multidisciplinary project. Practical scientific research is related to economic activity – will carry out necessary studies for commercial sectors on the practice of managing marginal areas by carrying out small agricultural investments (soil with heavy clay soil, low soil permeability, stones), as well as the development of recipes for organic soil improvers made from production by-products – wood ash (wood industry, energy production) and less demanded peat fractions. The study provides for the development of a recipe and a method for the production of such mixtures, which will be selected according to the amount of nutrients taken from the scientific test plant of willows of local origin established in 2011 and 2016. Test the effectiveness of the mixtures – soil improvers’ efficiency. The effect on growth and rooting will be tested in Salix alba pot crops, then the soil improver will be tested under field conditions. Planting will be carried out in marginal areas with and without fertilisation, as well as using various methods of fertilisation. In parallel with the development of the recipe for soil improvement mixture, the local White Willow stands will be surveyed, selected, multiplying female and male juvenile fast-growing clones with high-quality stem characteristics and good rooting of cuttings, and the breeder’s rights protection procedure has been initiated. In rows of wood plants there will be ecologically plastic perennial grassland, which will serve as bee pasture.Research work is divided into 4 activities:1. Administrative and publicity measures of the research (Project Administrative Management and Sustainability Requirements Provision of the project’s visibility and popular scientific information; 2.Assessment of the advantages and disadvantages of the technologies and methods used to date in test plantations and volumes, which are installed in marginal areas by improving the soil by organic means.3.Development of recipes for mixtures of organic soil improvement products containing wood ash and peat-containing organic soil improvement product, establishment of a description of its technological process, verification of suitability for production conditions.4. Six high-level scientific articles will be published. Two new jobs have been created for environmental engineers and 5 people will build competence. After the conclusion of the research, new scientists and competence nominated employees will retain their jobs for the 5s.The Latvian State Forest Science Institute Silava (LSFRI Silava), which specialises in forest science, forestry, breeding, will implement the project, in consultation with representatives from agriculture, waste management and peat industry.The total eligible costs of the project are EUR 328531.31, from which the European Regional Development Fund funding EUR 212888.29 (64.80 %) and private eligible costs EUR 115643.02 %. Project implementation duration – 36 months, from 01.10.2020 to 30.09.2023.