Due to the very small root system, whose main mass develops in a 20 cm layer of soil, the onion has high soil requirements. The best and the highest onion yields are achieved on moderately compact, well-structured, adequately moist soils, with a high humus content and rich in nutrients. The best soils are: bogs, loess and peat soils. The optimal pH for mineral soils is 6.5-7.0. Onions are sensitive to deficiencies of: zinc, manganese, copper and molybdenum. If soil analysis has not been performed, the number of mineral fertilizers per hectare at the sites in the first year after applying manure should be: 80-120 kg N, 100-150 kg P₂O₅, 150-200 kg K₂O.

Fertilization technologies

Taking into account the different expectations of farmers in terms of crop nutrition, we have prepared for you three complete proposals for foliar fertilization. 
The following technologies have been prepared in response to these expectations, in order to optimally nourish the crop and are for reference. If you have any questions regarding the details of the technology and the adjustment of the individual dosage of the indicated products, we invite you to contact our Team.