I forgot the mention that variation of apple tree growth and
yield were closely related to one parameter; water holding
capacity at field capacity within the rooting zone.
One should be wary of assumed soil quality in residential
areas. Fill is sometimes whatever can be secured at least cost;
e.g. coarse gravel with a frosting of soil on top. And unmodified
soil profiles sometimes have surprises at depth.
-------- Forwarded Message --------
Dear All,
Some days ago I asked where O. fagi was present in NS. And
today noticed a reply to the effect that such information would be
found at iNaturalist. The information there was in effect;
everywhere which is no more of use than a map which consists
entirely of white paper.
START OF DIGRESSION
Very briefly; agriculture, settlements and urban areas are
generally on the better soils except for ports where location by a
suitable harbor is key. And woodland tends to be on the poor
leftovers.
But even in farmed soils, unfavorable profile features can
make for a 10 fold difference in rate of apple tree growth and
yield on rows 100' long. Or for heaving and longevity of trees.
END OF DIGRESSION
The specific locations of even 100 sites where O. fagi has
overwhelmed Beech trees and 100 or less where it has not might
offer a clue for best management of this pest; GPS readings
converted to Long. & Lat.
In 1972 a good soil survey map was prepared for the entire
province of NS. Surveys of entire provinces are expensive so I
expect copies are still in stock. If not I have a copy.
For orientation purposes (is there any association between
damage by O. fagi and soil type ?) one would need only (1) a
qualitative evaluation of beetle damage by late August and (2)
some evaluation of tree vigor e.g. typical shoot extension by late
August. And a brief site description; approximate slope, exposure
and vegetation. e.g. grassed lawn, grassed field or woodland.
These are just suggestions based my a first hand unfamiliarity
with the facts.
Those who have seen O. fagi damage will be in a better position to
improve on the above.
Dave, Kentville
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