Bui. 1477, U. S. Dept. of Agriculture 
Plate 36 
TSt % 
£*J*V 
Growth and Fruit-Spur Development of Sugar and Tragedy 
Plums in Relation to Pruning and to Soil and Other Condi- 
tions 
A. — A 6-year-old Sugar plum tree which has been headed back at different times to induce 
branching and has been kept open to encourage the growth of twigs along the older 
wood 
B.— Base of 14-year-old framework branches of a Tragedy plum tree, the branches of which 
have been kept well thinned out and only lightly headed back. Under these condi- 
tions spurs and twigs remain thrifty and productive along the older portions of the 
branches. The tree is growing in deep irrigated soil. (Compare with pi. 37, A. 
Wenatchee, Wash., August 5, 1923) 
C — A 10-year-old framework branch of the Tragedy plum which is growing in only moder- 
ately deep irrigated soil. The new shoots have been headed back and thinned out each 
winter. Note the strong new shoots and the retention of fruit spurs. (Placer County, 
Calif., December, 1923) 
