killed to ground level. All of the damaged
plants have survived, and where the top of the tree was killed, new
growth came up from the root. As only seedling Persian walnut trees were
under observation and included in the Purdue plantation, their sucker
growth will be used to form new tops.

The native walnut, hazelnut, hickory, and butternut had little or no
winter injury and many trees are very fruitful all over Indiana. The
improved strains of filberts and the Persian walnuts have only a few
fruits this year. Seedling Persians grafted or budded on native black
walnut survived, but there was some damage to the top growth due to
immaturity of the wood and bud last fall. Before general planting
recommendations can be made, other than for the hobbyist or home-owner
with a few trees, further testing will be required.

Filbert and Hazelnut

The native hazelnut thickets are not as common now as in years past.
Most of the nuts were small and of little commercial value. When
hybridizers and other nut enthusiasts started improving the size and
quality of the native hazelnut and bringing in filberts from other
countries, some impetus was added to the filbert planting program. Only
a few took advantage of these new and promising seedlings, and aside
from a few small plantings throughout the state the filbert is placed in
the ornamental grouping of plants. Several areas in Indiana are suitable
for more extensive plantings. The Jones hybrids have proven satisfactory
and are found growing from the northern part to the Ohio River.

Several crosses were made four years ago using pollen from the Rush and
large fruited seedlings on the native hazel. There are 35 or 40 such
plants, two years old, now growing in the Purdue plot. They came through
the winter in excellent condition. Many of the catkins on the older
plants were killed during the early cold spell, and the nut crop this
year is very spotty. The filbert does have a place around the home as an
ornamental, as a fruit tree, or when used as a hedge for screening.

The Carpathian Persian Walnut

The Carpathian Persian walnuts in Indiana are practically all seedlings.
Many of these seedling trees show great promise, while others under
observation for the past few years are being discarded because of lack
of hardiness and production. Some few seedlings made vigorous growth and
produced fair to good yields for the past 10 years, but some weakness
was evident after the 1950-51 wi