assessment of changes in the phosphorus status of forest ...
assessment of changes in the phosphorus status of forest ...
assessment of changes in the phosphorus status of forest ...
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P %<br />
0.1 0.2 0.3 0.4<br />
Kiefer<br />
4 4,5 5 5,5 6 6,5 7 7,5 8 8,5<br />
Vandenburg-Klasse<br />
adequate<br />
low<br />
very low<br />
Fig 3: Relationship between nutrient classes <strong>of</strong> van den Burg (van den Burg<br />
1985, 1990) for Scots p<strong>in</strong>e and <strong>the</strong> critical needle P concentrations used<br />
<strong>in</strong> <strong>the</strong> nationwide <strong>forest</strong> soil survey.<br />
31