.«Iov. 17, 1923 
Bud Selection in the Washington Navel Orange 
321 
the unproductive portion has but fourteen. Thirteen of these are on one 
small branch, the foliage of which indicates that it is a reversion to the 
original Thomson strain. 
PROGENY PROPAGATION 
Propagations were made in the spring of 1915 from both the unpro¬ 
ductive and the normal parts of this tree, budding onto sour orange seed¬ 
lings of uniform size. Three trees grown from buds from the unproductive 
limb and two trees grown from buds from a normal branch of the parent 
tree were planted in a progeny orchard on July 2, 1917. These trees are 
part of a single row, planted 10 feet apart in the row, the three progeny 
trees of the unproductive limb being followed by the two progeny trees 
from the normal part of the same parent tree. Two trees of each progeny 
are shown in Plate 2. 
The orchard in which this progeny is located was planted on land where 
nothing but winter grain crops had been previously grown. Both winter 
and summer cover crops have been grown continuously in the orchard 
since it was planted, but no other fertilizing material has been used. The 
trees made a vigorous, healthy growth and came into bearing three 
years after planting. 
PROGENY PERFORMANCE RECORDS 
The three progeny trees from the unproductive limb have produced a 
total of five fruits in the three seasons since they came into bearing, while 
the two progeny trees from the normal branches of the same parent tree 
have produced a total of 317 oranges, or an average of 53 fruits per tree 
each year. Table 1 shows the number of fruits produced by these trees 
each year since they came into bearing. The illustrations of these 
progeny trees were all taken at the same distance and have been reduced 
to the same scale in order to show the relative differences in size. 
What fruit has been produced by the trees of the unproductive strain 
has been similar to that borne by the trees of the normal Thomson strain. 
The progeny trees of the unproductive strain have made a more vigorous 
growth than have those propagated from the normal branches of the 
parent tree, as shown in Plate 2, and the two groups of trees show the 
same foliage differences that characterize the unproductive and normal 
parent branches. 
Table I .—Records of the annual production of progeny trees propagated from an un¬ 
productive limb and from a normal branch in a tree grown from a single bud of the 
Thomson strain of the Washington navel orange 
Season. 
Progeny of un¬ 
productive limb. 
Progeny of 
normal limb. 
Tree 1. 
Tree 2. 
Tree 3. 
Tree 4. 
Trees. 
1920 to 1921. 
I 
3 
0 
18 
50 
1921 to 192a. 
O 
0 
0 
61 
60 
1922 to 1923... 
O 
0 
I 
56 
72 
Total. 
I 
3 
I 
135 
182 
