Apple rootstock trials

摘要

Abstract Results from an 18-year-old Dougherty rootstock trial at Oratia Research Orchard are presented. The following rootstock selections were included: Mailing XII, XIII, XV, XVI; Merton 778, 779, 789, 793; Northern Spy; and 3 local N.Z. selections—Large's No.1, H/1/26, and N/1/19. Heaviest crops were obtained from trees on Merton 793 and 779. Merton 793 is recommended for commercial use. Mailing XII is recommended for situations where extreme vigour is required. The local selection N/1/19 has been identified as Malling III. The influences of wet soil conditions, shade from hedges, and the special behaviour of trees on Malling XVI are discussed.