106 



FORM OF CLASSIFICATION OF MANURES. 



upon your land, as the lime from the kiln, provided you lay on an equai 

 quantity, and in an equally minute state of division. The effect will only 

 be a little more slow," &c. Ib. p. 387. 1849.] 



[By adopting the views which have been presented of the action of cal j 

 careous earth and of lime as manures, and those which are genet-ally re- 

 ceived as to the modes of operation of other manures, the following table 

 has been constructed, which may be found useful, though necessarily imper- 

 fect, and in part founded only on conjecture. The various particular kinds 

 of manures are arranged in the supposed order of their power, under the 

 several heads or characters to which they belong ; and when one manure 

 possesses several different modes of action, the comparative force of each is 

 represented by the letters annexed the letter a designating its strongest 

 or most valuable agency, b the next strongest, and so on as to c and d. 



PROPOSED CLASSIFICATION OF MANURES. 



f Alimentary, or serving as 

 food for plants as 



Solvent of alimentary ma- 

 nures as 



Fixers, or Mordants 

 serving to combine with or 

 'set other manures in' soils 



Neutralizing acids as 



Mechanical, or improving 

 by altering the texture of 

 soil as 



Specific, or furnishing in- 

 gredients necessary for par- 

 ticular plants as 



f Feathers, hair, woollen rags, 

 I Pounded bones, (b) 

 All putrescent animal and vegetable 



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) 

 Quick-lime, (a) 

 Potash and soap lie, () 

 Wood ashes not drawn, (of) 

 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. 



All calcareous manures, (b} 



Quick-lime, (b) 



Potash and soap lie, (b) 



Wood ashes, (c) 



Clay, 



Sand, 



Clay marl, (8) 



Fermenting vegetable manures, (5) 



Green manures, (b) 



Unfermcnted litter, (b) 



Sulphate of lime, or gypsum (for clo- 



ver), 

 Gypseous earth (or green-sand earth), 



for clover, 



Calcareous manures (for clover) 

 Phosphate of lime (for wheat) in 

 Bones, (a) and 

 Drawn ashes, () 

 _ Salt, for asparagus, (a). 1835.] 



