6 BULLETIN 955, U. S. DEPARTMENT OF AGRICULTURE. 



and 15 per cent of the potash, it is evident that 75 per cent of the 

 nitrogen, 70 per cent of the phosphorus, and 85 per cent of the potash 

 is available for fertilizers. 



Table 3. 



-Credits for manure and fertilizing constituents during the tivo winters and the 

 two summers. 



Item. 



Winter. 



Summer. 



1918-19 



1919-20 



Average. 



1918 



1919 



Average. 



Total manure saved tons. . 



355.2 



360.2 



357.7 



329.8 



314.6 



322.2 



Manure per cow pounds. . 



Manure credited per 100 poimds of milk, 

 pounds 



1,620 

 130.4 



1,740 

 125.1 



1,680 

 127.7 



1,420 

 81.6 



1,340 



74.8 



1,380 

 78.2 









Winter average. 



Summer average. 





Nitrogen. 



Phos- 

 phoric 

 acid. 



Potash. 



Nitrogen. 



Phos- 

 phoric 

 acid. 



Potash. 



FertUizmg constituents in manure, 



3,148 

 7.4 



1,180 



2.8 



1,860 

 4.3 



2,822 

 6.1 



1,073 

 2.3 



1,678 



Credit per cow pounds. . 



3.6 



When obtaining the quantity of manure saved, a number of factors 

 were taken into consideration — the time the cattle were out of the 

 stables, making the manure unreclaimable; the quantity of liquid 

 lost through leaks in the gutters; and the loss from leaching while 

 exposed to the weather. 



According to the method used for determining it, a ton of average 

 manure saved was computed to contain the following fertilizing con- 

 stituents : 



Nitrogen 8.8 pounds. 



Commercial phosphoric acid 2.3 pounds. 



Potash 5.2 pounds. 



The demand for newborn calves was very limited and many calves 

 were given away, nothing being received in return. This accounts 

 for the low credit of $1.60 per cow for the first year and $3.01 for the 

 second year. 



Table 4. — Credits hy years and by seasons for calves produced. 



Item. 



Year. 



1918-19 



1919-20 



Credit by seasons. 



Both 

 winters. 



Both 



summers. 



Number of calves 



Total value of calves 



Average value of calves 



Calves per cow 



Credit per cow 



Credit per 100 pounds of milk 



404 



$724. 75 



$1.79 



0.89 



$1.60 



0.030 of 1 



calf. 



351 



$1,325.59 



$3.78 



0.80 



$3.01 



0.024 of 1 



calf. 



367 



$985. 00 



$2.68 



0.43 



$1.15 



0.033 of 1 



calf. 



388 



$1, 065. 34 



$2.75 



0.42 



$L15 



0.023 of 1 



calf. 



