CARROTS, MANGOLDS AND SUGAR BEETS. 39 



ashes and the German Potash Salts, Sulphate and Muriate, 

 are the cheapest sources for Potash at present known, while 

 Soda and Chlorine are most cheaply obtained from the 

 waste salt of the fisheries. Of this I shall have more 

 to say presently when treating of salt as an auxiliary fertili- 

 zer. Lime is most cheaply obtained from the common Car- 

 bonate of Lime of the mason, either water or air slacked, 

 and this usually contains more or less of Magnesia. The 

 great source of Phosphoric Acid is the bones of animals or 

 coprolites, by which is meant the fossilized bones and dung 

 of extinct animals ; Sulphuric Acid is most cheaply obtained 

 from Plaster, which is Sulphate of Lime. 



Some hold great benefit is derived by the crop 

 of the following year, from ploughing under the leases 

 as soon as the roots are topped; the value of this is just 

 what the analyses of our table shows. The large crops 

 reported as raised in this country, have been raised on soil 

 raimng from light to a friable clay loam and have receive 1 

 all the way from eight to fifteen cords of barn-yard manure 

 to the acre. In some instances this has been all ploughed 

 in ; in others half spread broadcast and ploughed in and th : 

 other half put in the furrows. When coarse and unferment- 

 ed I would advise a deep ploughing of it under, in the Fall 

 As with Carrots, other waste substances can be used as sub- 

 stitutes for barn-yard manure, care being taken, eithei that 

 such waste substances are specially rich in Potash, Soda and 

 Chlorine, or that these substances be added. The equiva- 

 lents given are roughly estimated under the article treating 

 of the manure for Carrots and will be suvrl :ient for practical 

 purposes; I therefore make no further allusions to these 

 cheap wastes as sources for manure, further than to mention 

 that sea manures are specially rich in potash and soda. 



Of all roots Mangolds are the rankest feeders, removing 

 more plant iyi I from the soil than any oth :r root crop. Th : 



