The specificity of idle agricultural land colonization by arboreous plants

In the study the research of arable lands trans-formation which taken out of agricultural turn on the example of Magansk forest area of Krasnoyarsk Region where in 3-4 years after the termination of cultivation of agricultural cultures the uneven cover-ing of arable land with grassy vegetation promoting gradual clotting overgrowing formed by tree species was conducted. The main reason for gradual over-growing of arable land with wood vegetation from wood wall deep were high temperatures on soil surfaces, trampling shoots by cattle and subgrowth destruction by mouse-like rodents. Conducted re-searches show that in pine young growths growing on not used farmlands which do not have proper-ties of forest soils the increase in diameter at the root's neck in comparison with subgrowth under wood bed curtains, the formation of cone-shaped symmetric crone and a good vital shape were not-ed. Therefore, the young growths of coniferous species growing on arable lands conform to tech-nical requirements and can be recommended for gardening of settlements. Thus, the analysis of a natural forest growth of old arable lands allows to estimate the characteristic and viability of conifer-ous subgrowth, to predict the subsequent agrotechnical actions for rational use of ordinary pine for receiving planting stock.