21 



AVERAGE MILK AND BUTTEU YIICLD l>KIi COW DAILY, (Ibs.) 

 Ration. 



Black grass, 



English hay, 



Percentage increase, 



English over black, +4.40 +5.24 +6.06 



The black grass ration produced practically 5 per cent less milk 

 and butter than did the P^nglish hay ration. Black grass however 

 represented only about 40 per cent of the digestible matter of the 

 ration, and mathematically, one might calculate that if 40 per cent 

 black grass caused a 5 per cent shrinkage, 100 per cent black grass 

 would cause 12.5 p.T cent shrinkage ; i. e. a ton of dry material in 

 the form of black grass wo'ild produce 12i per cent less than an 

 equal amount in the form of P^nglish hay. This figure (12^ per cent) 

 tallies well with the results oi the digestion te»ts. The conipaiison 

 however cannot be strictly made from a practical standpoint, for the 

 reason that it would not be advisable to feed cows on salt haj' only. 

 A slight correction, against the black grass ration, would also have 

 to be made because of the loss of live weight during that period. 



COST OF MILK AND BUTTER. 



Milk Butter 



per quart. per pound. 



Black grass, 1.84 cents 15 cents 



English hay, 2.22 " 18 " 



Percentage less cost of black grass ration, 17.4 16-7 



The ration containing the black grass, because of its lower market 

 value,* produced milk and butter from 18 to 20 per cent less than 

 did the English hay ration. 



E>XPERIMENT II. 



Fox grass ration (high mamh hay) vs. English hay ration. The 

 animals ate the high marsh hay without any objection. Average 

 results with five cows for 21 days : 



FEEDS CONSUMED PER COW DAILY. (Ibs.) 



Fox English Corn Wheat Cliicago 



Ration. grass. liay. ensilage. bran. gluten meal. 



Fox grass, 12.50 — 28 5 2.9 



English h;iy, — 11.60 28 5 2.9 



* The following valuations were pnt on the feed stuffs : English hay $18 per ton, 

 salt hay $10 per ton, corn ensilage $3 50 per ton, wheat bran $15 per ton, Chicago 

 gluten meal $20 per ton. It was believed that $10 and $18 represented fairly well 

 the average market values of the two hays in towns along the coast. 



