THE ASH, OE MINERAL PARTS OF PLANTS. 



CHAPTER XVI. 



THE ASH OF CULTIVATED PLANTS AND ITS VARIED 

 COMPOSITION. 



In the following tables collected from various sources in 

 which the results of thousands of experiments by the most 

 noted agricultural chemists and investigators have been 

 published, will be found the average composition of the ash 

 of the plants named. These plants have been gathered from 

 the crops grown under ordinary circumstances, and when 

 there has been any unusual variation in any samples, a 

 large number of analyses have been made and an average 

 taken. These analyses have been verified so often by more 

 recent examinations that they have been accepted as the 

 standard, and are used for all purposes, and for reference in 

 all recent agricultural study. They may therefore be ac- 

 cepted by students with the utmost confidence and reliance. 

 They are given in full because hereafter frequent allusions 

 and references will be given to them in future chapters. 



COMPOSITION OF THE ASH OF AGRICULTURAL 

 PRODUCTS. 



- .d -' I 1 a 



Substances. %4 * 'g S --3 % .2 ' 



i * I . fl r f- s 



HAY AND GRASS. 



Ordinary hay 7.78 25.6 7.0 4.9 11.6 6.2 5.1 29.6 8.0 



Young grass 9.32 56.2 1.8 2.8 10.7 10.5 4.0 10.3 2.0 



Ripe hay 7.73 7.6 2.9 3.4 12.9 4.4 0.7 63.1 5.7 



Timothy 7.1 28.8 2.7 3.7 9.4 10.8 3.9 35.6 5.0 



Hungarian 7.23 37.4 8.0 10.8 5.4 3.6 29.1 6.4 



CLOVER AND FODDER PLANTS. 



Green rape 8.97 32.3 3.8 4.5 23.1 8.7 16.3 3.2 7.6 



