Mineral Nutrients 



139 



COMPOSITION OF 100 PARTS OF THE PURE ASH 



sium content. Different parts of the same plant may 

 exhibit great diversity in ash content, indicating an im- 

 portant selective absorption between cells and organs. 



74. Effects of conditions upon ash content. For any 

 particular plant or plant product produced under diverse 

 conditions the ash content is subject to considerable varia- 

 tion ; and this variation, while most marked with respect 

 to total ash content, extends also to the ratio of the dif- 

 ferent elements of which the ash is composed. Official 

 analyses of the sugar-beet show an ash content, calculated 

 to dry-weight, of from 3.2 to 14.6 per cent. There may be 

 a difference with varieties of any plant, but even in the 



