13 



Table 3. - Production and quality of hay under specified fertility treatments 

 on native sod, two-cut versus one -cut system of harvesting, Blackstock 

 Experimental area, Colorado, 1950-53 



PRODUCTION 



Method of 







Fertility 



treatment 



y 





Average 



harvesting 



1 



; 2 



; 3 



4 



5 



■ 6 



Two-cut 2/ 



One-cut 



Tons 

 2. 56 

 2.42 



Tons 

 2. 78 

 2.42 



Tons 

 2.95 

 2. 86 



Tons 

 3. 15 

 3. 14 



Tons 

 3. 60 

 3.47 



Tons 

 3. 70 

 3. 72 



: Tons 



■ 3. 12 



3.00 



! 



Difference-- 



. 14 



.36 



.09 



.01 



. 13 



-. 02 



: • 12 



CRUDE PROTEIN CONTENT 





Percent 



Percent Percent P 

 14.9 14.5 

 10.2 8.9 



ercent 

 13. 8 

 8. 



P 



ercent P 

 13. 6 

 9. 3 



ercent 



13. 5 



8. 9 



Percent 



Two-cut 2/ 



One-cut 



15. 5 

 10. 6 



14. 3 

 9. 3 



Difference -- 



4.9 



4.7 



5. 6 



5. 8 





4. 3 



4. 6 



5.0 



]_/ Fertility treatments: 



(1) - no treatment. 



(2) - single application of 200 pounds of ^2^- ^^ 1950. 



(3) - annual application of 40 pounds of available nitrogen. 



(4) - annual application of 80 pounds of available nitrogen. 



(5) - annual application of 160 pounds of available nitrogen. 



(6) - combination of 2 and 5. 



2_l Average crude protein percentage of the 2 cuttings: The first or early 

 harvest would be approximately 1 percent less than average, and the second 

 harvest would be about 1 percent more. 



See Willhite, F. M. , and Rouse, H, K. , footnote 5, page 12. 



