MARKET MILK IIsT SOUTHEASTERN LOUISIANA. 5 



reduce or increase the value of a ton of manure below or above the 

 market price of the fertilizing constituents contained in it. 



Table 2. — Nwnher of coivs, average prodiLction, and requirements for keeping n covj 

 during each season and for the entire year, except charge for management. 



Item. 



Winter. 



Entire 

 year. 



Number of cows 



Average production per cow poimds. 



Feed: 



Purchased concentrates do... 



Home-grown grains do. . . 



Total concentrates do. . . 



Hauling and grinding grain 



Noncommercial roughage pounds. 



Commercial carbohydrate hay do. . . 



Commercial legume hay do. . . 



Total dry roughage do. . . 



Silage and other succulent roughage do. . . 



Bedding do. . . 



Pastiue 



Labor: 



Human hours. 



Horse do. . . 



Other costs: 



Building charges 



Equipment charges and dairy supplies 



Herd charges- 

 Taxes, insiu^ance, veterinary, medicines, and disinfectants 



Interest on cow investment 



Cost of keeping bull 



Motor-truck charge 



Cash hauling of milk 



Total of other costs except depreciation on cows . 

 Depreciation on cows 



Total of other costs . 



.8.55. 9 

 1,309 



927 

 22 



9J9 

 SI. 25 



185 

 200 

 118 



503 



1,026 



4 



S2.03 



75.3 

 11.6 



S3. 33 

 4.50 



1.07 

 2.95 



1.08 

 .12 



13.05 

 2.92 



929.4 

 1,797 



939 

 5 



944 

 SO. 89 



35 

 145 



S3.; 



89.2 

 12.1 



$3.07 

 4.14 



.99 

 2.72 

 .66 

 .05 

 .11 



11.74 

 2.69 



892.6 

 3,106 



1,893 

 $2.14 



202 

 209 



127 



538 



1,171 



4 



So. 58 



164.5 

 23.7 



$6.40 

 8.64 



2.06 



5.67 



1.74 



.17 



.11 



24. 79 

 5.6r 



30.40 



The value of a ton of manure, which was considered to be the same 

 for summer and winter, was based on the market price of the fertilizing 

 constituents contained in it, which were as follows: Nitrogen, $0,375 

 a pound; commercial phosphoric acid, SO. 075 a pound; and potash, 

 $0,275 a pound. 



Only that manure which was saved or which could have been saved 

 by using reasonable care with the equipment available was credited 

 to the cows. It was not possible to weigh the quantity of manure 

 dropped by each herd, but a record was kept of the time the cows were 

 actually in the stables. This made it possible to figure the weight 

 of the manure voided in the barns, for, according to the best author- 

 ities, a 1 ,000-pound cow will produce 13 tons of manure in a year, or 6^ 

 tons in 6 months. The manure dropped on pasture was not credited 

 to the herds. If a credit had been given, then an offset charge for 

 fertilizer against pasture would have been necessary. 



Since a cow during digestion utilizes on the average only approxi- 

 mately 25 per cent of the nitrogen, 30 per cent of the phosphorus. 



