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Published in Scientific Papers. Series B, Horticulture, Vol. LXVII, Issue 2
Written by Diyan GEORGIEV, Maria GEORGIEVA, Denitsa HRISTOVA

The scientific experiment was conducted during the period of 20 8-2020 in a collection plantation of the Research Institute of Mountain Stockbreeding and Agriculture in Troyan. The object of the study is the 'Shopska Alena’ raspberry cultivar. The plantation was created in the autumn of 20 6. Correlation analyzes were made between the vegetative indicators: number, height and thickness of the shoots with the yield. The highest values for height ( .38 m) and thickness (8.4 mm) of the shoots were recorded in the second year of the experiment, and the highest yield was obtained in the third year - .69 kg/ m2. A high correlation dependence between the height and thickness of the shoots was recorded through all three years and between the height and thickness with the yield in the second and third year.

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