Characterization of the Kentville Stock Clone apple rootstocks. II. Precocity and productivity

The precocity and productivity of 30 Kentville Stock Clone (KSC) apple (Malus domestica Borkh.) rootstocks, with 'Mclntosh' and 'Delicious' as scion cultivars, were assessed independently of each other using a procedure involving computer-aided fitting of curves to yearly production data. A good fit to the data was obtained after biennial fluctuations in yield were removed by using a weighted, 3-year running average. For all 30 rootstocks combined, 'McIntosh' was more precocious and reached a higher level of productivity compared to 'Delicious'. There was poor correlation between precocity and productivity