66 



CALCAREOUS MANURES— THEORY. 



I'ROPOSED CLASSIFICATION OP MANURES. 



Alimentary., or serving ■{ 

 as food for plants— as I 



Solvent of alimentary 

 manures— as 



Fixers, or Mordants- 

 serving to combine with 



or set other 

 soils — as 



manures m 



Feathers, hair, woollen rags, 



Pounded bones, {h) 



All putrescent animal and vegeta- 

 ble substances, as dung. 



Stable and farm-yard manures, (a) 



Straw, (a) 



Green crops ploughed in, and dead 

 grass and weeds left on the sur- 

 face, (a) 



Q,uick-lime, (a) 

 Potash and soap lie ? (a) 

 Wood ashes not drawn 1 (d) 

 Paring and burning the surface of 

 the soil, (a) 



Calcareous earth, including 

 Lime become mild by exposure, (a) 

 Chalk, (a) 



Lime-stone gravel, (a) 

 Wood ashes, (b) 

 Fossil shells, (or shell marl,) (a) 

 Marl (a calcareous clay,) (a) 

 Old mortar and lime cements. 



s 



( 

 Neutralizing acids— as ■{ 



I 



Mechanical, or im- 

 proving by altering the 

 texture of soil— as 



All calcareous manures, (6) 

 Q,uick-lime, (b) 

 Potash and soap lie, (6) 

 Wood ashes, (c) 



All calcareous manures, (c) 



Marl, ib) 



Clay, 



Sand, 



Fermenting vegetable manures, (ft) 



Green manures, (b) 



Unfermented litter. (/>) 



Stimulati)ig— as 



Specific, or furnishing 

 ingredients necessary for 

 particular plants— as 



Nitre? 



Common salt ? {b) 



Sulphate of linie, or gypsum, (for 



clover,) 

 Gypseous earth, (or green-sand 



earth,) for clover. 

 Calcareous manures (for clover) 

 Phosphate of lime, (for wheat) in 

 Bones, (a) and 

 Drawn ashes, (a) 

 Salt, for asparagus, (a) 



