413 



|)l;ils; jiTtd tlio valiioof tlicsaino, allowiiis" 25 coiits porhuslicl (brsliollecl 

 (oi'ii and ><5 jm-i (on for (slover. The; author's coiicliisions arc as follows: 



(1) Ohemicals when properly mixert can I'nlly take the place of farm- 

 yard manure as a source of plant food. Tliis is shown by the averajjes 

 of the best plats in each set. (2) Cliemicals when ])roperly mixed can 

 and do give greater increase of crop than commercial fertilizers. (3) 

 The average chemical composition of fertilizers for New Hampshire 

 should be phosphoric acid, 9 to 11 per cent; potash* 9 to 15 per cent; 

 nitrogen 2 to 4 percent; whereas the fertilizers offered to us in the 

 market average, i)hosphoric acid, 11 per cent; i)otash, 2.5 per cent; 

 nitrogen. 2.5 per cent." 



The author advocates home mixing of crude chemicals, and reprints 

 ^',ie formulas of fertilizers for corn, wheat, oats, hay, and potatoes given 

 in Bulletin No. G of the station. 



New Hampshire Station, Bulletin No. 11, November, 1890 (pp. 14). 

 Kesults of feeding- skim-milk and corn meal versus corn 



MEAL AND MIDDLINGS, G. H. WhITCHER, B. S. (pp. 3-10). — The 



experiment was made to compare the financial results of the use of 

 skim-milk and wheat middlings in fattening young pigs. "Within our 

 State to-day there are probably 100,000 cows, producing 300,000,000 

 pounds of milk, of which about three fourths, or 225,000,000 pounds, is 

 made into butter. Now, on an average, we get not far from 80 per cent of 

 the whole milk as skim-milk; consequently the annnal quantity of skim- 

 milk that the farmers of New Hampshire have to dispose of is 180,000,000 

 l)Ounds, and if this is worth 25 cents per hundred it represents a value 

 of $4.50,000." 



Six pigs, grade Chester Whites, about six weeks old, were divided into 

 two lots nearly alike in total live weight. Daring a prei)aratory period 

 of 10 days they were all fed on skim milk. At the end of that time the 

 total live weight of the three pigs in lot 1 was 90.5 pounds, and those 

 of lot 2, 100 pounds. 



The two rations were so made as to contain like amounts of digesti- 

 ble dry matter; one was conij)osed of 1 part by weight of corn meal to 

 2 ])arts of skim-milk, and the other of equal ])arts by weight of corn 

 nuial and wheat middlings. The feeding extended from Septembers to 

 January 14, 133 days, and was divided into five periods, the first three 

 of which were of 21 days duration and the remaining two of 35 days. 



During the first period lot 1 was fed the skimmilk and corn-meal 

 ration and lot 2 the mixed-grain ration. In the second period lot 1 was 

 changed to the mixed-grain ration and lot 2 to the skimmilk and <;orn- 

 meal ration; and so on tliroughout the experiment, alternating the two 

 lots from the skim-milk and corn meal to the mixed-grain ration, and 

 rice versa, at the beginning of each period, the change being an imme- 

 diate one. Theamountof eaciiof thetwo rations fed daily was through- 



