TRUCK FAEMING. 



595 



Below is a table by Sir J. B. Lawes, showing the amount of phosphoric 

 acid, potasli, and nitrogen in various foods, and the comparative value 



of the resultiu'v manure: 



Food. 



Cotton-seed cake 

 T.insoed c.ike .... 



Rape cake 



Beans 



Peas 



Corn-meal 



Wheat 



Oats 



Wheat bran 



Clover hay 



Meadow hay 



Wheat straw 



Oat straw 



Katabagas 



Common turnips. 

 Irieh potatoes 



Pliosidioric 

 acid reck- 

 oned as 

 phoiijihate 

 of lime. 



Per cent. 

 7.00 

 4.92 

 5.75 

 2.20 

 1.84 

 1. 1.-5 

 1.87 

 1.17 

 7.95 

 1.25 

 0.88 

 0.55 

 0.48 

 0.13 

 0.11 

 0.^2 



Pofash. 



Nitrogen. 



Per cent, 

 3.12 

 1.C5 

 1.7C 

 1.27 

 0.96 

 0.35 

 0. 50 

 0.50 

 1.45 

 1.30 

 1.59 

 0.65 

 0.93 

 0.18 

 0.29 

 0.43 



Per cent. 

 6.50 

 4.75 

 0. CO 

 4.00 

 3.40 

 1.80 

 1.80 

 2.00 

 2. 55 

 2.50 

 1.50 

 0.60 

 0.60 

 0.22 

 0.18 i 

 0.35 1 



Value of 



manure 



from 1 ton 



(2,000 



pounds) of 



feed. 



$27 80 

 19 72 

 21 01 

 15 75 



13 38 



6 05 



7 08 

 7 70 



14 59 

 9 04 

 6 43 

 2 68 

 2 90 

 91 



80 



1 50 



It is of course not claimed that under all circumstances the manure 

 from a tou of cotton-seed cake is worth S-7.SG, but that if the manure 

 resulting" from a ton of any of the foods named be as stated, then that 

 resulting from a ton of cotton seed is ^vorth in comparison $27.86. 



Harris says the manure from a tou of undecorticated cotton-seed cake 

 is worth $15.74: and that from a ton of cotton seed after being ground 

 and sifted, by which about 8 per cent, of husk and lint was removed, 

 is worth $13.25. The following table of Dr. Emil Wolff shows how 

 much of the various elements contained in the food of animals is re- 

 tained in their organisms and how much is voided in their excrements. 



Of 100 pounds of dry substance in the food, there is found in the ex- 

 crements : 



Dry sub.stance- 



Cow. 



Os. 



Sheop. Horse. 



Mean. 



In the dung 



lu the urine 



Total dry substance in the manure 



Pounds, i Pounds. 

 3S. 45. 6 



9.1 i 5.8 



Pounds. 



46.9 



6.6 



Pounds. 



42. 



3.6 



47.1 



53.5 



Poxtnds. 



43.1 



6.3 



45.0 



49.4 



Of 100 pounds of organic substance in the food there is found in the 

 excrements : 



