EXPERIMENTS IN ORCHARD CULTURE. 



191 



trees were set apart for specific experiments in the renovation of 

 an old orchard. The trees in question were about thirty-five 

 years old, planted on the western slope of a dry gravelly hillside. 

 They were divided into six groups, with appropriate check trees, 

 as indicated in the accompanying diagram. 



ORCHARD RENOVATION. — DIAGRAM OE THE ORCHARD. 





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TREATMENT OE THE ORCHARD. 



The history of the orchard, as given in Bulletin 89, is as 

 follows : " The soil is a light sandy loam, 6-8 inches deep, with 

 gravelly or sandy subsoil. The trees were set in 1866-70 in a 

 cultivated field which had previously produced corn, wheat, and 



