Table 34. Potash. 



The percentage of nitrogen in the entire plant as well as in its 

 parts decreases throughout the plant's life. The leaves have always 

 a higher percentage of nitrogen than the stems, while the latter 

 organ contains a greater percentage of phosphoric acid and potash 

 than the leaves. On the whole, all these vegetative parts are very 

 rich in their percentages of nitrogen at early stages ; but there is a 

 marked reduction of percentage in the leaves and in the stems of 

 the mature plant. The roots and grain contain gradually decreasing 

 percentages of nitrogen. The percentages of nitrogen in the leaves 

 and in the stems collected from plat A were higher, at the various 

 stages before flowering, than those from plat B, although both plats 

 were treated, as far as possible, in a similar manner. Hence, the 

 physiological functioning in the stems and leaves may be a more 

 delicate and intricate process than is usually supposed. 



