olerant of cold than the walnut.
The difference of one month in time of occurrence of the cold in the two
winters seems to have had more bearing on the damage to filberts than
the difference in temperature. In the Forest Grove, Oregon, area, and in
Clark County, Washington, filbert trees, however did suffer severely
from the cold last winter, but these two areas were the "cold spots" of
the Northwest.

It seems as if the same factors that accentuate winter damage in walnuts
work in a similar way on filberts, except that the elevation factor
does not seem to be of so great importance. Age of tree, level
of nutrition, and size of preceeding year's crop seem to be more
important than elevation. Young filbert orchards, on either hillside or
valley-floor sites, seem to be much less severely hurt than older
orchards on the same sites. It is the acreage of _young_ filbert trees
that will make good the agricultural statistician's estimate of 40 to 50
percent of a filbert crop this year.

I have seen one 32-acre orchard of 24-year-old filbert trees that was
injured beyond repair, but they were crowded and unfertilized. At the
very same location a 14-acre orchard of 15-year-old filberts with
adequate spacing was not seriously injured, even though the trees were
not fertilized.

One other orchard in a poor location and on waterlogged soil, which has
had little or no care, has likewise been lost. Filberts definitely were
hurt in the two "cold spots" previously mentioned, but official reports
of minus 18 degrees F. were common in that area.

There was a noticeable difference in damage to catkins between Daviana
and DuChilly. Very few Daviana catkins produced pollen; but DuChilly
seemed to be fairly normal.

Injury in filberts was confined mostly to the catkins and twigs.
Excessive sucker growth up and down the main trunk and branches has
taken place in the filberts, as is the case in walnuts.

In neither walnuts nor filberts was there much splitting of the bark on
the trunk. This was probably because there was no sudden fluctuation in
temperatures and sunshine was not excessive during the critically cold
days.

It has been previously stated that the filbert is possibly more tolerant
of cold than the walnut. In spite of this there probably has been more
extensive damage to filberts than to walnuts; but it must be remembered
that filberts are the principal nut crop in those two "cold spots." Not
many walnuts are grown there,