Soybean cultivation in Hungary has seen a decline due to unpredictable weather and perceived risk of return on investment. However, a study on the use of foliar fertilizers in the Philippines showed a significant increase in yield and income. This long-term experiment, conducted at the Philippine experimental station of the National Agricultural Research and Innovation Center, involved treatments from Natur Agro Hungária Kft. and found an average yield surplus of 18.5%. The aim is to develop treatments adapted to the nutrient supply capacity of soils. The study was conducted by the Independent Research Department of Crop Production of the National Agricultural Research and Innovation Center, with support from Natur Agro Hungária Kft. and in collaboration with the Fülöpszállás Nutrient Supply Duration Experiment, which has been running since 1983 and is dedicated to understanding the treatment effects on various field plant species and assessing the sustainability of crop production processes.