h a low head. It is a mistake to cut
off the low branches on the trees until they attain some size, they can
then be cut off."

Stoke: "Regarding the protection of nut trees against winter sun scald,
I find that if you take ordinary aluminum paint and paint the south and
southwest side of nut trees it will last for two years."

Dr. Smith: "Chestnut trees have blighted for me where the water table
was too high and trees of same origin or better drained ground nearby
did not blight. Blight is often a sign that the tree wants something it
lacks--much like disease in humans."

Results of a Chinese Chestnut Rootstock Experiment

J. W. McKAY[4]

Introduction

The propagation of chestnut species by budding or grafting has been
performed by different workers with varying degrees of success. Many
have found that grafted trees could be produced and grown successfully
but that graft union troubles developed in a certain percentage of the
trees either soon after grafting or a few years later. The variety
"Carr" is known to graft with difficulty in certain localities and to
give a high percentage of poor unions both at the time of grafting and
after a few years of growth. The question of relationship of scion and
stock has been considered by many workers to have an important bearing
on the success of grafting operations but no critical work has been done
to determine this point. Some investigators hold that scions of one
species may be grafted upon stock of another species without harmful
effects. The results of the budding experiment with Chinese chestnut
reported in this paper are the first of a series of tests designed to
contribute needed information about stock-scion relationship in
chestnuts.

[Footnote 4: Associate cytologist, Division of Fruit and Vegetable Crops
and Diseases, Bureau of Plant Industry, Soils, and Agricultural
Engineering, Agricultural Research Administration, U. S. Department of
Agriculture.]

Description and Results

The five seedling Chinese chestnut trees used in the experiment were
selected because of their heavy-bearing tendency and because of the
excellent keeping quality of the nuts. Two of the trees bear nuts of
large size while the other three bear nuts of medium to small size.
Seeds from the five trees were planted before the use of the seedlings
as stocks in the budding experiment was planned, and since the seedlings
from each tree were planted together replication of the exp