Bui. 1477, U. S. Dept. of Agriculture 
Plate 15 
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Response of the Wickson Plum Tree to Moderate Pruning 
A.— Branches from an irrigated tree which has not been pruned for 15 years. 
Note the lack of new shoots and twigs, but the very numerous old 
spurs. (Newcastle, Calif.) 
B,— An old tree in fertile irrigated soil which has been moderately headed back 
and thinned out each year. Photographed after pruning. Note the 
numerous spurs and vigorous twigs, (Newcastle, Calif.) 
