coinH-»<iiTinN OF cin.TrvATFn crops. 



n 



TABLK lU. 



Cvbonie ■eid, • 

 8«|ptaneMid, • 

 PhoifjtMrie aud, 



Man 



OOQMy 



Iron, 



Chweoal ia Mb, ] 



These do not represent the ex€id composition of the 

 ash from the above crops, in all cases, but should be 

 considered only approximations. In diHerent situa- 

 tions, there is frequently a considerable variation in 

 composition; this does not, however, affect the general 

 character, where the soil contains a full supply of 

 necessary substances. The wh from healthy potatoes, 

 C ' ■ never rt-^' 'iiat from a flourishiog 



ii. The ; < a may be regarded as 



I lug suffuiently near the truth for all practical 

 i . ^• 



nonoN n. on thb sbpakatiom or plants crro classks, 



ACOOSMNO TO THE COMPOSmON OP THXIl ASH. 



I have inserted in comparison with the grain of 

 wheat, an analysis of ash from the straw ano, as an 

 illustration of the iliiT* r.ti.t> in the substances which 

 they respect iv(.'l> n the soil. 



a. It will be iioiii ( w (ii.tt in the aali from tike grain, 

 phasnhoric arid i.<t thf c)>i<>t' inGcredaciU, f tfng up 

 nearly hulf : )K>tash also is in large (juantity, being 



