1 .pdf (1 Tabl.) copia del Póster original presentado por los autores en el Meeting.Nutrient deficiencies occur in most areas devoted to agricultural practices, causing major losses to farmers. For instance, Fe deficiency in fruit trees growing in calcareous soils leads to decreases in fruit quality, yield and also to early tree death. Nutritional disorders in crops are corrected by adding mineral elements in standard routine treatments, often ignoring the real nutritional status of trees. Thereby, application of fertilisers on a regular basis can lead to an excess of available nutrients in relation to the real nutrient demand of crops. Such nutrient surplus can be either immobilised in the soil or leached, and can consequently contaminate superficial and underground waters. Therefore, our knowledge about nutrient budgets in fruit tree crops should be improved.This study was supported by the Spanish Ministry of Science and Innovation (Project AGL2006-1416, co-financed with FEDER), the European Commission (Project Isafruit, Thematic Priority 5-Food Quality and Safety, 6th Framework RTD Programme, Contract no. FP6-FOOD-CT-2006-016279), AECID (Project A/8333/07) and DGA (Group 03).Peer reviewe
