abstract: The main aim of the study was to evaluate the agricultural usefulness of rye weak and rye weakest complexes which occur within the Wysokomazowiecka Uplands. Most of them are developed from sands, with very low content of clay and, according to FAO, are classified as Cambic Arenosols. These soils are characterized by high acidity, low content of potassium, magnesium, calcium and average content of phosphorus. Generally, the productive capabilities of Cambic Arenosols are very limited. Taking into consideration the properties of these two agricultural soil utility complexes - soils of the rye weak complex (6) should be used for crop production and will play important role in sustainable rural land development. Cambic Arenosols classified in the 7th complex, characterized by the lowest quality and agricultural usefulness, should be gradually excluded from production and their functions should be changed to other purposes (forest, ect).