Research on the sustainable use of the soil as the main agricultural resource employing different field crop rotations and tillage systems was started in 2009. The influence of new technologies on sustainable output of agricultural raw materials used for safe and good quality food and feed production was studied at the Latvia University of Agriculture, Study and Research Farm “Peterlauki” where long-term field experimental plots were established specially for this purpose. Complex investigation of the soils at the experimental plots was performed.

In the recent years the issue of optimal size of the utilised agricultural area and its accessibility in particular regions has gained increased importance. Total area, types and conditions of the utilised agricultural area are essential to shaping and implementation of the Common Agricultural Policy. This research comprises investigation of the single area payment and the area payments done in scope of the Rural Development Programme for the time frame of 2007 – 2011.

Degraded territory is land which has been damaged by either industrial and other activities or no activities at all to the stage where any economic activity is impossible unless special renewable measures are implemented. One of the aims of sustainable environment resolutions adopted by the United Nations General Assembly on 25 September, 2015 was ‘to restore degraded land and to aim to achieve having a world neutral to land degradation’. This is the first worldwide document where universal and comprehensive actions regarding land degradation are provided.

The results of birth growth investigation in the 9 year old plantation on the abandoned podzolic soils of agriculture lands are assumed. The planting density was 1100; 1600; 2500; 5000 and 1000 plants per hectare. The average heights have reached 5.31 and 5.36 m, but average DBH 5.38 and 5.36 cm in the plots with 10 000 and 5000 trees per hectare accordingly. The average height has reached 6.47; 6.65 and 6.73 m but average DBH 7.17; 6.67 and 7.38 cm in the plots with 2500; 1000 and 111 trees per hectare accordingly.

Attempts to estimate the allowable maximum population density is well known in the history of game management in Latvia. Relatively permanent environmental features (e. g. landscape and forest structure) have been used for the assessment of carrying capacity of hunting grounds. Amount of the available winter feed was considered as a limiting factor for major game species in each landscape unit and forest type. While focusing on the actual abundance of feed, many other factors, including mutual interaction among species and populations, were overlooked.