Question
Malling IX is a rootstock
of:Solution
From about 1917, collaboration between East Malling and the John Innes Institute, in Merton Park in Surrey, gave rise to the Malling-Merton series, which were resistant to Eriosoma lanigerum, the woolly apple aphid. Common Malling rootstocks in the 1940s: US M2, M7, M8, M9 and M13. UK M1, M2, M9, M12, M13 and M16.
10                          15                          ?                    �...
If   314     306      x      269       394    178    1480
Then, 1/3 x + 2x - x = ?
...12Â Â Â Â Â 13Â Â Â Â Â Â 22Â Â Â Â Â Â 47Â Â Â Â Â 96Â Â Â Â Â ?
...24  12  18  ?  157.5  708.75  3,898.125
21Â Â Â Â Â Â Â Â Â Â 48Â Â Â Â Â Â Â Â Â Â 173Â Â Â Â Â Â Â Â 516Â Â Â Â Â Â Â Â 1245Â Â Â Â Â Â 2576Â Â Â Â Â Â ?
...51     53     109     332     ?     6686
...9 134 170 ? 577 1306
...12    16    43    ?       184    220
...13 24 75 134 447 892
...97 106 121 138 157 180
...
