Uncontrolled spatiotemporal changes in large urban areas can produce several problems such as environmental pollution, diminishing valuable agricultural lands; irregular industrialization and urbanization due to number and proportion of residents continue to increase.

Mowing of grasses and bush vegetation appear one of the most important technological operations while exploitation the roads, dams and ameliorative channels. For such activity agricultural or ameliorative multi-rotor mowers with joint knives are used.

In the conditions of the Republic of Belarus it was determined that as a result of drainage and prolonged agricultural use (about 50 years) on the ground of former peat bogs there were formed peat-mineral soil complexes of different evolution stages with distinct rates of nitrogen fraction quanti

With 48% forest cover, the Greater Mekong Subregion still has large areas of forest remaining. The area of primary forest is, however, low and falling, while large tracts of forest are highly degraded and forest planting rates remain low in most countries.