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Effects of nitrogen on growth properties and phenology of silver birch (Betula pendula Roth)

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Figure

Table 1. Characteristics of the soil substrate
Table 2. The content of elements in dry matter of leaves in particular treatments in 2008
Fig. 3. The root collar diameter of birch plants (B. pendula) in particular treatments (see Fig
Fig. 4. The course of budbreak in categories 0–5 (0 – bud with an intact bud scale, 1 – bud with an intact bud scale and showing through green colour, 2 – apical part of a bud with a green tip, 3 – disturbed bud top exceeding 1 mm, 4 – unfolding leaves, 5 – developed leaves) of birch B. pendula in particular treatments T0–T3 (T0 – application of 0 g NH4NO3, T1 – 0.5 g NH4NO3, T2 – 1 g NH4NO3, T3 – 1.5 g NH4NO3) (error bars represent 0.95 confidence intervals) (2007–2009)
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