APPLYING LIME 



The Fineness of Limestone. Experiments at 

 the Pennsylvania experiment station have shown 

 that limestone has practically immediate avail- 

 ability in an acid soil if all of it has ability to pass 

 through a screen having 60 meshes to the linear 

 inch. Much of the limestone meeting this test 

 doubtless is fine enough to pass through an 100- 

 mesh screen. The requirement that a 60-mesh 

 screen be used in testing is a satisfactory one to the 

 buyer that wants immediate results in the field. 

 A coarser product must be used in larger amount 

 per acre, as only the fine particles are available at 

 once, and the object of the application is to cor- 

 rect all the acidity. Where a coarse product, 

 containing some fine particles, can be used at such 

 a low price per ton that the application may con- 

 sist of a large number of tons per acre, the prac- 

 tice may be commended, but the essential thing 

 is immediate results, and only finely divided lime- 

 stone can give them. Any long railway or wagon 

 haul makes a heavy application of coarsely pul- 

 verized limestone inexpedient. 



Hydrate d Lime. Many salesmen are too 

 enthusiastic in their claims for hydrated lime. It 

 has advantages over pulverized limestone, stone- 

 lime, and pulverized lime, and there are disad- 



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