Bui. 1477, U. S. Dept. of Agriculture 
Fruit-Spur Development and Bearing Habits of the Grand 
Duke Plum in Relation to Pruning and to Soil and Other 
Conditions 
A. — Old fruiting branches on a tree which has not been pruned for many years, 
growing in fertile irrigated soil. (Note contrast with branches in pi. 24, B) 
B. — Fruiting branches of a tree which is growing in fertile irrigated soil and has been 
headed back each year. Most fruit is found at leafless nodes near the base 
of 1-year-old wood and on short leafless 1-year-old spurs on 2-year wood. 
The leafless 2-year-old wood will be barren next year. (Newcastle, Calif., 
July, 1922) 
C. — A 3-year-old fruiting branch of a tree which is growing in fertile irrigated soil. 
Note fruit at leafless nodes of 1-year-old wood. These twigs grew from ter- 
minals of 1-year-old twigs and spurs which did not fruit last year. Short 
spurs which fruited last year and died after the fruit harvest are seen along 
the main branch. (Yakima, Wash.) 
