| УДК |
Аннотация: Needle analysis studies were presented to supplement the growth analysis of combined green-pruning and nitrogen-fertilizing on Norway spruce (Picea abies) by Kramer. The experiment included the following variations: unpruned-unfertilized, pruned-unfertilized, unpruned-fertilized and pruned-fertilized. Several different development tendencies differenciated from the needle analysis: 1. A general production increase in all plots due to thinning by rows and cleaning. 2. Results of fertlizing. 3. Results of pruning. 4. Interaction, espacially between 1. and 2. 5.General observations were made for the interpretation and the method of the needle analysis which in part add to, or contradict the present level of knowledge, experiences and hypothesis.
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