the graph shows the effect of these factors on the net energy of the first 

 cutting in each hay. The hay grown under the 150 lb. nitrogen fertiliza- 

 tion had the greatest decrease in net energy as the harvest was delayed. 

 Also the total yield of this hay did not increase at the rate the other hays 

 did because of lodging. The 100 lb. per acre nitrogen fertilization pro- 

 duced a high total yield and a fairly steady net energy content. 



Figure 2. Effect of Geographic Location, Variety, Level of Nitrogen 



Fertilization and Cutting Date upon Seasonal Yield and Yield of Net Energy 



of Timolhv Hay When Fed to Non-lactating Cattle. 



Q: 

 o 



CO 



Q: 

 Ui 



a: 



>- 

 Ul 



Ul 



5800 r 

 5400 

 5000 

 4600 



4200 

 3800 

 3400 

 3000 

 2600 



15 

 JUNE 



30 



11 



