A MIXTURE SHOULD BE PREFERRED. 119 



ash contained in the crop, and the substances of which 

 it is coinposeil, we can now understand why such small 

 quantities ot these manures, seemingly thrown away 

 when spread over an acre of ground, should still con- 

 tain enough to supply all that is required by the plant 

 of their particular constituents. The largest crop of 

 v' ' ia Table viii, 54 bushels, would not 



< I the grain more than 60 lbs. of ash, 



than 10 lbs. would be potash or soda. 

 \ the 1 cwt. of nitrate of soda sup- 



f>iied enough of that material to have furnished at 

 east 150 bushels, and a large part of the straw beside. 

 The supplying of such minute quantities to the plant, 

 we have seen to be quite necessary, as much so as are 

 the bolts and nails to a ship: these are but a rery 

 its entire bulk or weight, and yet it coakt 

 1: her without them. 



When lilt- tanner intends to use any of these ma- 

 nures, it is in nearly every case better to make a mix- 

 ttire. One hundred weight of nitrates of potash and 



soda. ''*' -rnon salt, sulphate of soda and sulphate 



of m ill mingle<l together, and applied with a 



few b\»neis of gypsum, would be much more likely to 

 mr^ the wants of any soil, than a hundred weierht of 

 t "^ ^1 mixtures are found t})ly 



r the basis of the a. ma- 



nures no\> : into vogue. These ma* 



nures an .....:. liie price is r e as o na ble, «nd 

 the farmfT assiire<l of their nurity. I have known 

 instances of most audacious caeatini^ in thcM thiagi^ 

 and in a way ton that oooM not readily be disoovertd 

 unless by a chemical evr T' fanner dxiuki 



not buy these manur*^ « t confidenot 



in the nv tless, as was reoommeaded 



with ret;:i Mirniriiiii Mtlyiitbf «M»- 



)>etent chemists, and icarrnni the mamire sold to Uli 

 fw.,.ni :n .1., ,|itv. If it fails hia, be can tben htm 

 1 from them. 



