The invention relates to a soil conditioner, which stabilizes the soil structure of agricultural and forestry Nutzflaechen, to improve the heat and water balance and as a remedy for erosion and deflation on agricultural and forest land, dumps, heaps, Boeschungen, Baugelaende and other vegetation poor or .- loose surfaces can be used. As a means to improve the soil structure and soil temperature Biolipidextrakt in amounts of 0.5- 7 m high 3 / ha is used. The viscosity is reduced by the addition of plant-compatible solvents. The biolipid extract can also be added to herbicides, mineral fertilizers and plant seeds.