158 FOOD FOR PLANTS 



Michigan Agricultural College, at their experiment 

 plots in the Warren-Farrand Orchard, gave the fol- 

 lowing average yield per tree from Nitrate and check 

 plots : 



Year Nitrate Check Plots 



1921 245.6 lbs.* 86 lbs.* 



1922 184.6 " 113.7 " 



1923 486. " 181.5 " 



1924 494.5 " 118.6 " 



At Owensville, Ohio, the Ohio State Agricultural 

 College is conducting an experiment on 12-year-old 

 Grimes Golden apples under cultivation with a cover 

 crop of soy beans. Five pounds of Nitrate yielded 

 an average of 13 bushels per tree as against the yield 

 of lj/2 bushels per tree from the check plot under the 

 same culture without Nitrate. 



The Tonoloway Orchard of the American Fruit 

 Growers, Inc., at Hancock, Maryland, has applied 

 five pounds of Nitrate of Soda to a unit of 4573 York 

 Imperials for four years. The average yield per tree 

 was: 



Year Bushels 



1922 11.29 



1923 8.74 



1924 11.11 



The acreage planted to York Imperials in the rest 

 of the orchard which received no Nitrate followed the 

 usual biennial habit of this variety. 



* The average weight of a bushel of apples is 48 lbs. 



