14 WILSON & TOOMER FERTILIZER COMPANY 



limestone. Bock lime is sometimes used on extremely 

 plastic (stick} 7 ) clay soils, but should not be applied to 

 ordinary soils as its violent action burns out the humus. 



Hydrated or Water=Slaked Lime Hydrated lime is 

 rock lime combined with about one-third its weight of 

 water; therefore, seventy -four pounds are equal in basic 

 qualities to fifty-six pounds of the rock lime or one hun- 

 dred pounds of limestone. If, for the purpose of saving 

 freight rock lime is purchased, it should be water-slaked 

 before application. This can be done by putting it in 

 piles of three or four bushels scattered over the field 

 and covering the piles with four or five inches of damp 

 earth. For best results, leave it for several days rather 

 than to hasten the slaking by applying all the needed 

 water at once. The best commercial hydrated lime comes 

 in 40-lb. paper bags. It is put up in this way to pre- 

 vent air-slaking. About one ton of hydrated lime is 

 used per acre. It acts more readily than crushed lime- 

 stone because of its particles being so much finer, but 

 though the ton application may give as good results 

 the first year as a three-ton application of crushed lime- 

 stone, its effects on the land will be seen less than half 

 as long. 



Air=Slaked or Carbonate of Lime As said above, all 

 forms of free lime eventually revert to carbonate of lime. 

 If rock and hydrated lime are exposed to the air they 

 gradually take on carbon dioxide until fully combined. 

 Air-slaked lime is exactly the same chemically as lime- 

 stone and has the same value as base; however, its physi- 



