OTHER FORMS OF LIME 



the market is used to correct soil acidity, 

 and at the best it is worth only what good 

 lime carbonate is worth. It has no hidden 

 virtues, and cannot take the place of fer- 

 tilizers. It is an excellent means of meeting 

 the lime-requirement of land when bought 

 right, and its fine division makes it dis- 

 tinctly superior to coarse stone. 



There should be no confusion of a lime 

 marl with the so-called "green sand" marl. 

 The latter is low in lime, and may be acid, 

 the value of the marl being in a consider- 

 able percentage of plant food contained. 



Oyster Shell. Ground oyster shell is a 

 good source of carbonate of lime. The per- 

 centage falls below that of limestone, but in 

 addition there is a little nitrogen and phos- 

 phoric acid. An analysis of a good quality 

 of oyster shell, as found on the market, will 

 show 90% carbonate of lime. 



Burned oyster shell has something near 

 the same composition as lime made from 

 stone, but it goes back to hydrate and air- 

 slaked forms rapidly. There is no large 

 amount of burned shell lime on the market, 

 the material known as shell lime being the 

 ground shell, or lime carbonate. 



Wood Ashes. A large supply of lime in 



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