236 



APPENDIX. 



TABLE 



Of the Mineral Constituents added to and removed from the Soil in thi 

 Cultivation of Helianthus tuberosum. (Topinambour.) 



(Boussingault, Economie Rurale, p. 336.) 



* The woody and other parts of the plant were burned on the -spot, and 

 thus left to the soil. 



Hay grown in Meadows, watered by the Sauer, near Durrenbach, in tw* 

 crops (1841 to 1842) yielded 6 to 6"2 per cent, of ashes of the following 

 composition : — 



