the diameter of the twig.) The bud is
inserted in the stock as in ordinary T-budding, then wrapped with a
large sized rubber budding strip. (Westinghouse electrician's tape and
Curity adhesive tape have also been used. Some other brands poisoned the
buds.) The "take" of Chinese chestnut buds by this method has run from
60 to 90 per cent on Dr. Richards' trees of various sizes this year. In
a short nursery row, buds were placed under first or second year bark,
while larger trees were topworked by placing the buds mostly under the
bark of second year limbs.

The Colossal failed again on Dr. Richards' trees when budded by the
"Twin-T" method, but Carr and other Chinese varieties were budded
successfully. The graft-compatibility problem in chestnuts is one of
considerable complexity. Thus Carr, which has presented incompatibility
with certain stocks of C. mollissima at other places, grew on these
trees, and Colossal, compatible on another C. mollissima tree, failed on
trees which are apparently compatible with Carr. The Chinese chestnut
species varies in its graft-compatibilities possibly as much as in other
characteristics (growth, productivity, size and quality of nuts, etc.)
so that nut nurserymen should begin to select their seed for chestnut
understocks with a view toward getting strains with a greater degree of
compatibility to the leading scion varieties.

Mr. Roark has been able to propagate the Colossal upon its own roots by
layering a small tree in his orchard. Two limbs pegged into the ground
in the spring of 1945 had produced roots a year later, and were then
detached from the parent tree. This is a slow but sure method of
propagating nut tree varieties that are not congenial with the stocks
available for grafting or budding. He has also layered sweet cherries
and prune trees by this method which is described in U.S.D.A. Farmers
Bulletin 1501 with reference to filberts.

A Heartnut Variety Compatible with Black Walnut Stocks

Seedling black walnuts are common on farms of west Tennessee. Dr.
Richards and Mr. Rhodes have been most active in showing that these can
be topworked readily to improved black walnut varieties under the
conditions prevailing there. Mr. Rhodes has also fruited such older
Persian walnut varieties as Lancaster, Mayette, and Franquette on black
walnut stocks, but finds them generally unproductive in his climate.
Newer varieties, including some selections of the Carpathian strains are
now