n although, no doubt, there is a practical limit. It must
have plenty of food to produce successive crops of nuts, and barnyard
manure is the safest and most practical kind to use. This can be put on
as a heavy mulch around the trees but some of it should also be spaded
into the ground. One must always remember that the feeding roots of a
tree are at about the same circumference as the tips of the branches so
that fertilizer put close to the trunk will do little good except in
very young trees. Since 1936 we have been watching a small native
walnut which came into bearing while in a nursery row. This tree bore
such fine thin-shelled easy-to-crack nuts and lent itself so readily to
being propagated by graftage and had so many other good characteristics
that we have selected it as representative of the black walnut varieties
for the north and have named it the Weschcke walnut and patented the
variety. A list is here appended to show the order of hardiness and
value based on our experience:

1--Weschcke--very hardy--excellent cracking and flavor

2--Paterson--very hardy--excellent cracking and flavor (originating
in Iowa)

3--Rohwer--very hardy--good cracker (originating in Iowa)

4--Bayfield--very hardy--good cracker (originating in Northern
Wisconsin)

5--Adams (Iowa)--fairly hardy--good cracker

6--Ohio--semi-hardy, excellent cracking and flavor (parent tree in
Ohio)

7--Northwestern--a new, good hardy nut

8--Pearl--semi-hardy--good (from Iowa)

9--Vandersloot--semi-hardy--very large

10--Thomas--tender to our winters--otherwise very good (from
Pennsylvania)

11--Stabler--tender--many nuts single-lobed

12--Throp--tender, many nuts single-lobed

A friend of mine, who lives in Mason, Wisconsin, discovered a black
walnut tree growing in that vicinity. Since Mason is in the northern
part of the state, about 47 deg. parallel north, this tree grows the
farthest north of any large black walnut I know of. I would estimate its
height at about sixty-five feet and its trunk diameter at about sixteen
inches at breast-height. Because of the short growing season there, the
nuts do not mature, being barely edible, due to their shrinkage while
drying. Some seasons this failure to mature nuts also occurs in such
varieties as the Thomas, the Ohio and even the Stabler at my River Falls
farm, which is nearly 150 miles south of Mason. Such nuts