According to the experiment scheme, there is used soya culture among olive tree lines sown as green fertilizer and ploughed in a blossoming phase.
Soya culture in a blossoming phase contains a large number of nutrition elements, it has a maximum quantity of green mass. Stems, leaves are soft, they are easily rotten in the soil, which enriches the soil by so-called organic Organic mass. The latter helps to increase soil fertility. The advantage of this option is explained by the fact that soya develops a callus on roots, in which a callus bacteria is settled. They transfer atmospheric nitrogen into a digestible form of the plant that is absorbed by the root system of the olive tree.