ISHS Acta Horticulturae 274: International Symposium on Diagnosis of Nutritional Status of Deciduous Fruit Orchards
THE CONTENT OF INORGANIC NITROGEN IN SOILS OF ORCHARDS IN DIFFERENT PLANTATION AREAS |
| Authors: | D. Näfe, K. Lerche, G. Schönberg |
| Abstract:
A version of the Nmin-method so far used in agriculture has been applied to deciduous fruit tree orchards. The usefulness of this method is discussed on the basis of measured contents of inorganic nitrogen in soils of different plantation areas. The investigated factors (year; nitrogen application differing in amount and date; soil management carried out as overall herbicide usage or herbicide strips with grassed alleys; sampling site) have proved less important for light soils and comparatively more important for medium and heavy soils. The obtained results reveal that the background of usual nitrogen fertilizer recommendations should be revised. Referring to this an advanced approach for valuating the content of inorganic nitrogen of orchards is proposed. | |
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