Bui. 1477, U. S. Dept. of Agriculture 
Plate 34 
Growth and Fruit-Spur Development of the Sergeant Plum in 
Relation to Pruning and to Soil and Other Conditions 
A. — A 25-year-old tree which has been lightly pruned for several years and is growing in fertile 
unirrigated soil. Note the open growth and spreading branches. (Vacaville, Calif.) 
B.— A 16-year-old tree on which the new shoots have been severely headed back each year. 
There are comparatively few large new shoots, but the spurs and twigs are making a 
■vigorous growth throughout the tree 
C— A 16-year-old fruiting branch of a tree which has not been pruned for several years and is 
growing in very heavy unirrigated soil where wood growth is exceptionally slow. 
Note the persistence and branching of all the old spurs which were formed when the 
branch was young. Also note lack of any new twigs or shoots 
