Our target is to optimize the forcrops on the three largest fields in Hungary with the formed cropmix. Winter wheat, maize, and sunflower are more than half of all arable land in Hungary, so there would be a significant need for optimal crop production of these crops. After the completion of the project, the selection of seeds for ecological seeding is more purposeful and professional. In order to make smarter the using of the green-maker cropmix we have to develop the cropmix which is the best for the aptitudes of farmers. We had focused on the three largest fields in Hungary when planned the mix of the crops: autumn wheat, sweet corn, sunflower. The consortium was established with the target to make the best precorn for these three arable crops. To identify the mix of the species which have the best parameters regarding the post-sowings, many observations are necessary. Justifiable the observation of the soil life, the organic material of the soil, capability of the nutrient providing and the therm, air, water supply capability. The mentioned parameters can be analyzed with the soil samples. Based on the data obtained from soil samples it can be determined to what extent different mixtures contribute to maintaining and improving the fertility of soils.