MANUAL FOR SUGAR GROWERS. 



59 



The experiments were conducted with thirty -two 

 sheep kept in a fold with asphalt floor, so as to pre- 

 vent loss of manure. Some of the loss of nitrogen 

 is due to the escape into the atmosphere of ammo- 

 nium carbonate. 



" Muntz and Girard fed two Normandy cows each 

 with 53.5 kilograms of lucerne and 49 kilograms of 

 water daily. Each cow furnished 33 kilograms of 

 solid excreta and 18 kilograms of urine. The weight 

 of the animals increased by 15 kilograms during the 

 experiments, and they yielded 361 litres of milk. 

 With these cows the quantity of : 



The loss of nitrogen is much less than in the case 

 of sheep, due to the fact that the fermentation of 

 cow's dung is less active, therefore less ammonium 

 carbonate is formed. 



"From these experiments it will be seen that farm- 

 yard manure does not return to the soil all the nitro- 

 gen which was originally extracted from it by grow- 

 ing crops. A portion goes to form flesh and milk, 

 and another portion is lost in the form of ammonia." 



From these experiments it will also be seen that 

 pen manure is of somewhat less manurial value than 

 the combined food and bedding from which it is de^ 



