886 



WHEAT. 



910. According to a more recent analysis by Way, 

 a sample of white wheat from Whitfield farm con- 

 tained in 100,000 parts, grain 1730, and in the straw 

 4680 parts of inorganic matter. Hopeton wheat 

 from the same place contained in the grain 1760, in 

 the straw 4160, and in the chaff 10,360 parts of in- 

 organic matter. 10,000 parts of these ashes respec- 

 tively consisted of: — • 



911. With such data it is easy roughly to calcu- 

 late about the quantity of each substance taken off 

 from the soil with a crop of wheat. Suppose, for 

 example, a crop of Hopeton wheat, consisting of 22 

 cwt. of grain, 30 of straw, and 15 of stubble and 

 roots ; the latter, of course, remaining in the soil 

 need not be reckoned. The grain, then, would con- 

 tain about 43 lbs., and the straw (including 4-cut 

 chaff) nearly 180 lbs. of inorganic matter ; the for- 

 mer containing nearly 20 lbs. of phosphoric acid, 

 14 lbs. of potash, 1 lb. of soda, and nearly 4J lbs. of 

 magnesia. The inorganic matters in the straw would 

 include about 120 lbs. of silica, 12 J lbs. of phos- 



