I've got a couple of pairs in this study. For a while I thought there was little difference between fertilised and not but now I see the fertilised trees have significantly longer new candles. Take a look.
First the A team:
c pine study A 1 2014 11 - Copy.JPG
c pine study A 2 2014 11 - Copy.JPG
Longest new shoot on 1A (fertilised over winter) is 170mm long. Mid length shoots are around 100mm.
Longest new shoot on 2A (only fertilised since spring) is 140mm long. Mid length around 70mm.
The B team show even greater differences.
c pine study B 1 2014 11 - Copy.JPG
c pine study B 2 2014 11 - Copy.JPG
Longest new shoot on B1(fertilised over winter) is 280mm. Mid length shoots around 150mm
Longest new shoot on B2 (only fertilised since spring) is 130mm. Mid length shoots around 70mm
I have also treated a pair of younger seedlings just for interest.
c pine study C 1,2 2014 11 - Copy.JPG
Not much difference in growth between these younger trees but they have put on plenty of growth. They are both in 15 cm pots for scale reference. Note that the unfertilised one has produced female flowers.
C2 (unfertilised) has slightly longer shoots at 380mm. Longest shoot on C1 only 350mm long!
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