NY00043 - Nutrient Charting as a Tool for Fine-tuning Fertilizer Use in Nursery Production Systems

Nutrient charting is a procedure for obtaining early warning of nutritional disorders. It is based on the interpretation of trends in key nutritional indicators in the plant of growing medium which have been measured at regular intervals during the production period. The findings suggest that the appearance of a crop and the theoretical longevity of a fertilizer are not a reliable basis for deciding when supplementary feeding is required. The results obtained from nutrient charting provided a basis for reformulating the fertiliser program. These programs are presently under evaluation.