KEEPIXG MANURE UNDER COVER. 



61 



they buy a ton of tlic same manure that has been kept under cover 

 until Februury, they get, nitroj^en, 15 lbs.; soluble minerals, 42.i 

 lbs. In April, tiiey get, nitrogen, 33| lbs. ; soluble minerals, 67i 

 lbs. In August, they get, nitrogen, 3o| lbs. ; soluble minerals, 61 

 lbs. In November, when the manure is over one year old, they 

 get, in a ton, nitrogen, 30i lbs. ; soluble minerals, 88^ lbs. 



When manure his not been exposed, it is clear that a purchaser 

 can afford to pay considerably more for a ton of rotted manure 

 than for a ton of fresh manure. But waiving this point for the 

 present, let us see how the matter sUmds with the farmer who 

 makes and uses the manure. What does he gain by keeping and 

 fermenting the manure under cover ? 



The following table shows the weight and composition of the 

 entire heap of manure, kept under cover, at different times : 



TABLE SHOWlXa C IMPOSITION OP EXTir.E EXPEKtMEXTAL HEAP (NO. 11.) FRESH 

 FARM-TAUD MANURE, UNDER SUED. 



i ^'^P''^ April 30,' An;;. 23, [ Nor. 15, 



1855. 



1855. 



1&^)5. 



fl)s. 

 Weight of manure 3.258. 



ft 8. 

 1,013. 



Amount of water in the manure 2,150. 



Amount of dry matter 1,102. 



♦Consistiiis of soluble organic matter.. . 



Soluble mineral matter, 

 tlnsoluble organic matter. 

 Insoluble mineral matter. . 



♦Containing nitrogen 



Equal to ammonia 



tContaining nitrogen 



Equal to ammonia ... 



Total amount of nitrogen in manure. . . . 



Equal to ammonia 



The manure contains ammonia in free 

 state 



The manure contains ammonia in form 

 of Baits, easily decomposed by quick- 

 lime 



Total amount of organic matter 



Total amount of mineral matter 



50.14 



a3;i.iT 



131.92 



1,102. 



4.S5 

 5.88 

 16.08 

 19.52 

 20.93 

 25.40 



1.10 



2 86 

 919.94 



182.06 



917.6 

 695.4 

 74.68 

 54.51 

 410.24 

 155.97 



695.4 



4.38 

 5..33 

 14.88 

 17.46 

 19.26 

 22.79 



lbs. 

 1,297. 



5(«.2 

 733.8 

 53..56 

 39.55 

 .337.32 

 303.37 



B>s. 

 1,2.35. 



733.8 



3.46 



4.20 

 13.08 

 1.5.88 

 16.54 

 20.08 



1.62 



484.92 

 210.48 



.19 



1.33 1 



390.88 1 

 342.92 , 



514.5 

 720.5 

 66.28 

 54.68 

 »4].97 

 257.57 



720.5 



5.25 

 6.37 

 13..54 

 1644 



18.79 

 22.81 



.23 



1.80 

 408.25 

 312.35 



This is the table, as given by Dr. Voelcker. For the sake of 

 comparison, we will figure out what the changes would be in a 

 heap of five tons (10,000 lbs.) of manure, when fermented under 

 cover, precisely in the same way as we did with the heap fer- 

 mented in the open air, exposed to the rain. The following is the 

 table: 



