XXIV CONTENTS 



PAG1S 

 IV. PRODUCTION AND MARKETING. 



Barley Crop of the World ;^^S 



Barley crop of the United States, p. 339 ; Barley crop 

 of Canada, p. 339 ; Center of barley production, 

 p. 340; Yield per acre, p. 340; Exports and im- 

 ports, p. 340 ; Commercial grades, p. 340. 



History 341 



Practicums 34:) 



The plant, p. 342 ; The grain, p. 342 ; Soil fertility 

 in relation to barley, p. 343. 



Collateral Reading , .344 



CHAPTER XXIII.— RYE. 



Relationships 34 j 



The plant, p. 345 ; Composition, p. 346 ; Varieties, 

 P- 347 ; Climate, p. 347 ; Soil, p. 347 ; Rotation, 

 p. 348 ; Rye as green manure, p. 348. 



Cultural Methods 341^ 



Enemies of rye, p. 349 ; Harvesting, p. 350; Use, 

 p. 35 1 ; Rye as a soiling crop, p. 35 1 ; By-products, 

 P- 352. 



Rye Crop of the World 35 5 



Rye crop of the United States, p. 353 ; Center of 

 production, p. 354 ; Yield per acre, p. 354; Com- 

 mercial grades, p. 354. 



History 354 



Practicums 355 



Influence of specific gravity upon germination, p. 

 355; The study of the plant, p. 355. 



