Stock and scion investigations. XI. A twenty-year pruning and rootstock trial with apple treesTools Thomas, L.A. (1965) Stock and scion investigations. XI. A twenty-year pruning and rootstock trial with apple trees. Queensland Journal of Agricultural and Animal Sciences, 22 (2). pp. 187-192.
AbstractJonathan apple trees on 3 clonal rootstocks, M.XII, Essfour and Ivory’s Double Vigour, were pruned by 3 different systems from 1939 to 1959.
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