Bui. 1477, U. S. Dept. of Agriculture 
Plate 37 
Growth and Spur Development of the Tragedy Plum in Relation 
to Pruning and to Soil and Other Conditions 
A.— An old tree which has been kept well thinned out but only lightlv headed back. Note 
growth of twigs and spurs. Annual pruning of new shoots has just been finished. 
Tree growing in deep irrigated land. (Courtland, Calif., January, 1924) 
B.— The 10-year-old framework branch of a tree which has an unthrifty stock. Spurs rather 
than twigs or shoots form on unthrifty trees. (Compare with pi. 36, B) 
