The retrospective analysis of forest cultures creation technologies on hilly sands of the Average Don and their silvicultural assessment

On sandy terraces in the basin of Central Don hilly sands are the most difficult for forest improvement. During their development 4 technologies of creation of forest cultures are developed and approved: 1 - soil preparation by furrows, hand planting; 2 - soil preparation by furrows, the mechanized planting; 3 - the mechanized planting with simultaneous cultural operations; 4 - preliminary ridging, prelanding cultivation, the mechanized planting (modern technology). Efficiency of technologies is estimated on the following indicators: 1) survival; 2) safety of plants in forest cultures; 3) biometric indicators of plants; 4) structure of forest stands on diameter; 5) level of influence of tree species in mixed plantations. Survival of forest cultures at technical acceptance made 97-99% when using technologies ¹ 1-3 and less than 50% - when using technology ¹ 4. Advantage of hand planting over mechanized is shown since 4-6 growth. Lack of modern technology is large number of technological operations...