868 
Journal of Agricultural Research 
Vol. XXI, No. i 
The graphs in figure 7 show the distribution of fruit spurs on two 
classes of mother shoots, one of which was typical of the pruned and 
the other of the unpruned shoots. They show that the types of dis¬ 
tribution in the two cases are fundamentally different. For the pruned 
shoots the greatest frequencies were observed for those having 3 fruit 
spurs or less. For the unpruned mother shoots there were none having 
less than 4 fruit spurs, and the highest frequencies were found for shoots 
having 12 to 18 fruit spurs. 
We may say, therefore, that the typical pruned mother shoot was 
characterized by few fruit spurs and that the typical unpruned mother 
shoot was characterized by relatively many fruit spurs. 
The foregoing statements may appear to contain nothing especially 
new to those familiar with the art of pruning. They do furnish, how¬ 
ever, quantitative data upon which an analysis of the growth response 
of the tree may be based. Horticulturists have long known that little 
or no pruning results in the production of shorter laterals and of more 
blossoms. Whether the tree is thereby rendered more productive or 
whether the fruit is of satisfactory quality is, however, another question. 
