FORMS AND APPLICATION OF LIME 



129 



water-slacked, quicklime is caustic and acts swiftly. In 

 the air-slacked form, the lime has been changed back 

 toward its original state, except that it is no longer in 

 stony masses but in very finely divided particles. In either 

 form, however, especially in the first, quicklime is apt to 

 decompose some of the humus in the soil. For this reason, 



A PILE OF SLACKED LIME. 



many farmers are coming to prefer the slower but more 

 beneficial action of the limestone rock. 



PENNSYLVANIA EXPERIMENTS WITH LIME YIELDS PER ACRE 

 DURING TWENTY YEARS. 



