Woody forest plantations, including shelterbelts, are one of the stabilizers of the optimal ecological state of the environment in agricultural landscapes. Shelterbelts are able to sequester carbon from the atmosphere in their phytomass and generate oxygen for a long time. These processes contribute to the partial but permanent prevention of global climate change. According to the calculations, we determined the volume of tree trunks in the protective strips, the cross-sectional area of the trunk, and the phytomass of wood, bark, and crown in a completely dry state. Based on the research data, correlations were created between the main taxonomic indicators and phytomass fractions, which showed a close relationship between phytomass fractions and the height and diameter of tree trunks. In the course of the research, a regression equation was built between tree phytomass and biometric indicators such as trunk height and diameter. The amount of carbon sequestered by the oak shelterbelts was determined by determining the proportion of carbon in the phytomass in absolutely dry residue. The main soil and climatic indicators were established, which in most temporary test plots were characterized by pH=7.0 (neutral), the level of atmospheric air temperature under the forest protection strips was 2°C lower than in agroecosystems (field), and the soil temperature was 8°C lower than in the studied agroecosystems. Soil moisture was identical. According to the statistical analysis, the sample was homogeneous in terms of height, diameter, and age of the plantation. The obtained results allow for further analysis and construction of regression equations between tree phytomass and biometric parameters — height, diameter. It has been determined that an increase in tree diameter by 1.94% and height by 1.0% has a direct impact on the growth of phytomass of common oak wood. It has been established that the total phytomass of oak in linear plantations is 157.7 kg for a middle-aged tree and 275.9 kg for a mature tree. According to the established value of the conversion coefficient of the carbon-absorbing capacity of field protection strips of oak plantations, CO2 emissions into the atmosphere in the Zhytomyr Polissia zone are annually reduced by 5%. The obtained equation of the conversion coefficient, with a sufficiently high determination index, makes it possible to use the obtained dependence in further calculations.