Wisconsin Dairymen's Association / Thirty-second annual report of the Wisconsin Dairymen's Association : held at Platteville, Wis., February 10, 11 and 12, 1904. Report of the proceedings, annual address of the president, and interesting essays and discussions relating to the dairy interests
Henry, W. A.
A lesson in fertility: the importance of feeding milling by-products in Wisconsin, pp. 31-41 PDF (2.3 MB)
3S Wisconsin Dairyimen's Association. not fertility, but they draw on the nitrogen and mineral mat- ters only in a limited way. The parts of these which do not stay in the animal pass off in the solid and liquid excrement. Here is a table showing what animals retain and what passes away from them: Per cent of nitrogen iapd ash voided as excrement or secured as animal produce with various farm animqls. Nrrwe|x. Asz. Obtained Voided as Voided as as carcam so id ex liquid cx- or milk. | crement. crement. Fattenning ox ... 3.9 22.6 73.5 Fattening sheep 4.3 16.7 79.0 Fattening pic. t14.7 22.0 63.3 Miuch cow ........ 24.5 18.1 57.4 Obtained Voided in In total as live excrement excrement. weight or asd per- Imilk, spired. 96.1 2.3 97.7 95.7 3.8 96.2 85.3 4.0 96.0 75.5 1 10.3 89.7 The above is an important table and should be carefully studied. From it we learn that the fattening ox keeps for his body use only 3.9 pounds of nitrog-en out of 100 supplied him in the food. The sheep keeps a little more, the pig a good deal more, and the cow 24.5 pounds, or about one-quarter. The cow takes up the most nitrogen from the food given her because she is a most economical manufacturer. She works up more of her food materials into valuable products. In this case the nitro- gen goes to form the cheese part of the milk. The steer uses the nitrogen to make red meat in its body and since the body of the fattening steer is largely developed at the time he is fat- tened, there is not much muscle or red meat built up during the fattening period. From this table we learn that if we wish to get the richest manure is to nitrogen we can have it by feeding steers, in which case we will get back in the manure about 96 per cent of all the nitrogen we supply the steer in the feed. If we feed dairy cows and sell the milk we have disposed of about one-quarter of the nitrogen given the cow in her feed and have three-quarters of the nitrogen left in the voidings. a
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