RECENT FARM EXPERIMENTS. 465 
Ivor Moor, Escrick Park, 
Manures applied. 
Manures applied product per acre.| product per acre. 
Amount of ma- 
nure per acre 
Tons. Cwts. Lbs. Tons. Cwts. Lbs. 
Mineral superphosphate -...- ewts.|' 3 " 
7% jebotesiisalts-...--.......--..- do=48}) 42 30 10 80 30 5 0 
Sulphate of ammonia........ dose.) f 
Selemanecraune. 2... -..-tons..| 20) 9) 27 0 0 30 10 0 
Mineral superphosphate -..-.cwt-.| 3 
On ebeasbsalts).--... 2.552. 5.-- do...| 2 30 0 0 ol 15 0 
MNiuimate of soda...-..---.---- does) 
PE COUN Oo. om oe = tons oO ei Ors s = 
10 ; Mineral superphosphate ----.cwt-.-| 14 § 3 ® 0 81 : 0 
[oi 2G (1 eee dozeslt 3 9 ae, 2 
HT ; Mineral superphosphate .-.- - do...| 14 ; SB i Oe ee De 1b 0 
At Escrick Park the fertilizer applied on plot 9, a mixture of min- 
eral superphosphate and potash salts with a small quantity of nitrate of 
soda, gives much larger returns than any of the other dressings 
applied ; while at Ivor Moor the use of sulphate of ammonia, in combi- 
nation with the superphosphate and potash salts, gives substantially the 
same results as are obtained from the employment of nitrate of soda in 
mixture. The fertilizer indicated on plot 9 is recommended by Pro- 
fessor Voelcker as an economical and beneficial artificial manure for 
mangolds, on light land. The combination of 10 tons of rotted dung 
with 14 hundred-weight of mineral superphosphate gives as good a 
product, on an average, as is obtained from the application of 20 tons 
of rotted dung. The products on plots 8 and 10 nearly equal each other 
in both experiments. A considerable variation is observed in the re- 
sults obtained from Peruvian guano alone in the two experiments, and 
Professor Voelcker remarks that, while the exclusive use of mineral 
phosphatic manures for mangolds on light land is not advisable, on the 
other hand the best crops are not obtained from the application of 
manures containing, like Peruvian guano, an excess of nitrogenous 
compounds. At Ivor Moor the addition of 2 hundred-weight of potash 
salts to 3 hundred-weight of mineral superphosphate produced fair 
results, giving about the same yield that was obtained from the addi- 
tion of 1 hundred-weight of Peruvian guano to the superphosphate ; 
’ but at Escrick Park the potash salts and superphosphate are decidedly 
more effective than the guano and superphosphate. In both experi- 
nents the mineral superphosphate applied alone ranks low in the scale 
of productiveness, and appears to be an unsuitable manure for man- 
golds on light land. 
Experiments in feeding.—Prof. J. B. Lawes states that numerous experi- 
ments at Rothamsted, England, show that on an average a pig weighing 
100 pounds will consume 500 pounds of barley meal, if supplied with as 
much as he will eat, and double his weight in sixteen or seventeen 
weeks. This amount of barley meal will contain 420 pounds of dry 
substance, and in the period of time stated, 74 pounds of this are util- 
ized in the 100 pounds increase of live-weight, 70 pounds pass into the 
manure, and 276 pounds are expended in respiration and perspiration, 
or, in other words, in the mere sustenance of life. If, however, the 
work of fattening be carried on more slawly, and the 500 pounds of 
30 A 
