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 two 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 pounds 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. 
Fertilizing 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 by years and by seasons for calves produced. 
Year. 
Credit by seasons. 
Item. 
1918-19 
1919-20 
Both 
winters. 
Both 
summers. 
Number of calves 
404 
$724. 75 
SI. 79 
0.89 
SI. 60 
0.030 of 1 
calf. 
351 
$1, 325. 59 
S3. 78 
0.80 
S3. 01 
0.024 of 1 
calf. 
367 
S9S5. 00 
S2.68 
0.43 
SI. 15 
0.033 of 1 
calf. 
388 
Total value of calves 
SI, 065. 34 
Average value of calves 
$2.75 
Calves per cow 
0.42 
$1.15 
Credit per 100 pounds of milk 
0.023 of 1 
calf. 
