20 



Table 6, - Estimated changes in production and quality of hay, by specified 



management practices 



YIELD PER ACRE 



Method of 



Increases result 



Lng 



from 



using fertility treatment - 1/ 



harvesting 



1 



] 2 



• 



3 



". 4 



5 \ 



6 





Tons 



Tons 





Tons 



Tons 



Tons 



Tons 



Single -cut: 

















Native sod 







2/ 0. 10 





0. 51 



0. 79 



1. 03 



1. 11 



Seeded sod 



0. 16 



. 33 





. 54 



.79 



J/ 1.03 







Two-cut: 

















Native sod 



. 14 



. 36 





. 53 



.73 



1. 18 



1. 55 



Seeded sod 



.28 



. 63 





.71 



.89 



1. 24 







PERCENTAGE CHANGE IN CRUDE PROTEIN CONTENT 



Percent Percent Percent Percent Percent Percent 



Single -cut: 



Native sod 



Seeded sod 



Two-cut: 



Native sod' 



Seeded sod 



4. 9 

 4. 5 



4. 3 

 4. 6 



-1. 

 -. 9 



3. 9 

 3. 8 



-1. 

 -1.0 



3. 2 

 3. 6 



3.0 

 3. 6 



3. 2 



4. 7 



!_/ For fertility treatments used, see footnote 1, table 3. 



2^/ Corrected for discrepancy: Table 2 shows an increase of 0, 18 ton per 

 acre, while other work has indicated no increase in production. Probably, 

 the difference is due to the level of ^2^5 iri the soil. 



3/ Corrected for discrepancy: Table 3 indicates that a two-cut harvest 

 will increase production by 0. 13 ton per acre. Later work by Willhite in- 

 dicates that production here should not exceed that of native sod receiving 

 160 pounds of nitrogen. 



Willhite, F. M. , and Rouse, H. K. Colorado Mountain Meadow Annual 

 Reports, 1952, 1953, and 1954. Fort Collins, U. S. Agricultural Research 

 Service, Soil and Water Conservation Branch. (Mimeographed. ) 



