Provisional values of the content of foliar magnesium (g per kg dry matter) for the estimation of Mg-deficiency in the leaves in the period from early August to mid September (4,8,9).
| Tree species | Mg-Supply | |||
|---|---|---|---|---|
| Too low | Low | Normal | Optimal | |
| Acer campestre | < 0.8 | 0.8-1.2 | 1.3-2.2 | > 2.2 |
| Acer negundo | < 0.6 | 0.6-1.2 | 1.3-2.2 | > 2.2 |
| Acer platanoides | < 0.8 | 0.8-1.6 | 1.7-2.7 | > 2.7 |
| Acer pseudoplatanus | < 0.8 | 0.8-1.6 | 1.7-2.7 | > 2.7 |
| Acer saccharinum | < 0.7 | 0.7-1.4 | 1.5-2.7 | > 2.7 |
| Aesculus hippocastanum | < 0.7 | 0.7-1.1 | 1.2-2.7 | > 2.7 |
| Alnus glutinosa | < 1.3 | 1.3-1.6 | 1.7-2.5 | > 2.5 |
| Alnus incana | < 1.1 | 1.1-1.5 | 1.6-2.5 | > 2.5 |
| Betula pendula | < 1.0 | 1.0-1.3 | 1.4-1.6 | > 1.6 |
| Carpinus betulus | < 0.8 | 0.8-1.2 | 1.3-2.7 | > 2.7 |
| Corylus avellana | < 0.9 | 0.9-1.8 | 1.9-2.5 | > 2.5 |
| Corylus colurna | < 1.2 | 1.2-1.6 | 1.7-3.0 | > 3.0 |
| Crataegus laevigata | < 0.8 | 0.8-1.4 | 1.5-2.2 | > 2.2 |
| Crataegus monogyna | < 0.8 | 0.8-1.4 | 1.5-2.2 | > 2.2 |
| Fagus sylvatica | < 1.0 | 1.0-1.5 | 1.6-2.3 | > 2.3 |
| Fraxinus excelsior | < 0.9 | 0.9-1.6 | 1.7-2.8 | > 2.8 |
| Gleditsia triacanthos | < 0.8 | 0.8-1.4 | 1.5-2.5 | > 2.5 |
| Juglans nigra | < 1.0 | 1.0-2.0 | 2.1-3.0 | > 3.0 |
| Juglans regia | < 1.2 | 1.2-1.8 | 1.9-3.5 | > 3.5 |
| Liquidambar styraciflua | < 0.7 | 0.7-1.2 | 1.3-2.8 | > 2.8 |
| Liriodendron tulipifera | < 1.0 | 1.0-1.8 | 1.9 -3.0 | > 3.0 |
| Malus domestica (*) | < 1.0 | 1.0-2.0 | 2.1-3.0 | > 3.0 |
| Platanus x acerifolia | < 0.8 | 0.8-1.4 | 1.5-2.6 | > 2.6 |
| Populus alba (*) | < 0.8 | 0.8-1.4 | 1.5-2.5 | > 2.5 |
| Populus x canescens (*) | < 0.8 | 0.8-1.4 | 1.5-2.5 | > 2.5 |
| P. x euramericana (*) | < 1.2 | 1.2-1.7 | 1.8-2.8 | > 2.8 |
| Populus nigra (*) | < 1.0 | 1.0-1.8 | 1.9-2.8 | > 2.8 |
| Populus tremula | < 0.8 | 0.8-1.4 | 1.5-1.7 | > 1.7 |
| Prunus avium (**) | < 1.2 | 1.2-1.5 | 1.6-2.6 | > 2.6 |
| Prunus cerasus | < 1.2 | 1.2-1.5 | 1.6-2.6 | > 2.6 |
| Prunus domestica | < 1.2 | 1.2-1.8 | 1.9-2.5 | > 2.5 |
| Pyrus communis (‘) | < 1.2 | 1.2-1.8 | 1.9-2.8 | > 2.8 |
| Quercus palustris | < 0.9 | 0.9-1.5 | 1.6-2.8 | > 2. |
| Quercus robur | < 1.3 | 1.3-1.5 | 1.6-2.8 | > 2.8 |
| Robinia pseudoacacia | < 1.0 | 1.0-1.5 | 1.6-2.2 | > 2.2 |
| Salix alba (*) | < 0.9 | 0.9-1.6 | 1.7-2.8 | > 2.8 |
| Salix triandra | < 0.9 | 0.9-1.6 | 1.7-3.0 | > 3.0 |
| Salix viminalis | < 1.0 | 1.0-1.6 | 1.7-3.0 | > 3.0 |
| Sorbus aria | < 0.8 | 0.8-1.4 | 1.5-2.2 | > 2.2 |
| Sorbus aucuparia | < 0.8 | 0.8-1.4 | 1.5-2.2 | > 2.2 |
| Tilia americana | < 1.0 | 1.0-1.5 | 1.6-3.0 | > 3.0 |
| Tilia cordata | < 0.8 | 0.8-1.1 | 1.1 -2.4 | > 2.4 |
| Tilia x euchlora | < 0.8 | 0.8-1.1 | 1.2-2.4 | > 2.4 |
| Tilia platyphyllos | < 0.8 | 0.8-1.2 | 1.3-2.8 | > 2.8 |
| Tilia x vulgaris | < 0.8 | 0.8-1.2 | 1.3-2.8 | > 2.8 |
| Ulmus carpinifolia | < 0.9 | 0.9-1.6 | 1.7-2.7 | > 2.7 |
| Ulmus glabra | < 0.9 | 0.9-1.6 | 1.7-2.7 | > 2.7 |
| Ulmus x hollandica (*) | < 0.9 | 0.9-1.6 | 1.7-2.7 | > 2.7 |