FERTILIZERS. 101 



CLASS No. 5. 



To make One Ton when mixed together. Containing Lb&. <>f 



Sulphate of ammonia . . . 150 Ibs. \ 



Nitrate of soda 200 " [ Nitrogen, 104.00, or 5.20 %oi ton. 



High-grade blood . t . . 350 " ) .,*,*.,, 



Bone-black superphosphate . 875 " Phos. acid, 140. 00, " 7.00% " 



' ' ' 350 \ 



Total 2,000 Ibs. 



Cost of materials unmixed $31.06. 



HOW TO MIX THE INGREDIENTS THAT ENTER INTO A 



FORMULA. 



Now let us try our hand at mixing together the ingredi- 

 ents that enter into a formula. As a base from which to 

 start, I have taken a local superphosphate made honestly 

 by Mr. A. L. Ames of Peabody, Mass., and have added to 

 this, plant-food from various sources. In mixing the vari- 

 ous ingredients together, you will need a sieve as fine again 

 as a common coal-sieve. Having cleared a place upon the 

 barn floor, and having decided upon quantities of each 

 element needed, first weigh these out, and have them near 

 at hand ; next, sift each lot that needs sifting, by itself 

 separately, breaking up with your feet or the back of the 

 shovel all lumps that will not pass through the sieve. 

 Now begin with the element you need most of, and sift a 

 portion of it evenly over a circle of sufficient width so that 

 the first layer will not be over an inch in depth. Follow 

 with the next, using about the same proportions as of the 

 first, and thus on until you have a proportion of each. Go 

 back again and repeat the process, until the quantities 

 weighed out are used up. If the entire mass is but six or 

 eight inches in depth, it will mix the easier. To mix, an 

 iron-toothed rake may be used ; cutting it down, and mixing 

 it, and ending by throwing it together with a shovel. If 

 well mixed, the entire mass will be of a uniform color. In 



