On biennality bearing of the apple cultivars
2000
Kask, K. (Estonian Agricultural Univ., Tartu (Estonia). Polli Horticultural Inst.)
Biennality of the cultivars was evaluated in terms of the intensity of devation in tree yields in (20-)24 successive years. The biennality index (I) was the biggest in the cultivars 'Antonovka', 'Koit', 'Krameri Tuvioun', 'Poltsamaa talioun', 'Sidrunkollane Talioun', 'Paernu Tuvioun' ('Treboux Saemling') and 'White Transparent' ('Yellow Transparent'). However, in a shorter (5-7 years) period, especially in 'White Transparent', an extraordinary even bearing level was noticed. 'Liivi Kuldrenett', 'Suegisdessert', 'Talvenauding', and'Tellissaare' had smaller biennality index. "On years" and "off years" may coincide in many cultivars or to be contrary to some cultivars
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