During this project a methodology will be developed which can supply the efficient agricultural praxis – based on the statistical methods and uses the data gathered by the farmers – and with the resoult of optimizing the yield. The methodology of processing of the high volume and huge density spatial data - collected in the precision farming- is in its infancy, as follows the developed methodology contains a significant innovational content, furthermore, it can bring economical advantage as well for the farmers who use the technology. The outcome of the project is a soil-sampling protocol which can be inserted to an individual provision for the assistance of precision farming, which is supported by economical calculations. The goal of the resulting methodology is to supply a technology which can ensure a site-specific nutrient spreading to the farmers thus they can get data which are in good quality on competitive service price. Besides of the adequate provisional standards, probably more and more farmers will choose the site-specific farming, which can contribute in the long run to a sustainable economy, and to the preservation of the condition of our soils.