OF THE ASH OF OATS. 317 



Grain. Straw. 



Potash 2-78 lbs. .1-80 lbs. 



Soda 2-90 0-48 



Lime 1-06 5-54 



Magnesia 1-80 0-76 



Alumina 0-25 1'46 



Oxide of Iron. . . . a trace. 0*14 



Oxide of Manganese . — 0*20 



Silica . • 11-82 38-56 



Sulphuric Acid . . . 0-59 1-18 



Phosphoric Acid . . 2-10 1-60 



Chlorine 0-19 0-70 



23-49 lbs. 52-42 lbs. 

 If the produce of a crop of barley amount to 38 bushels of 63 lbs. each 

 per acre, and the straw exceed the grain in weight one-sixth, the weight 

 of each reaped per acre will be about 



2000 lbs. of grain, ) ^ , r oo u i, i 



2300 lbs. of Law, ^''^^^ ^ P'°^"^® °^ ^^ bushels ; 

 and the inorganic matters carried off from the soil by each will be ob- 

 tained by multiplying those contained in the second column (above) by 

 2, and in the third by 2^. 



III. — or THE ASH OF OATS. 



in 1000 lbs. of the grain of the oat are contained about 26 lbs., and of 

 the dry straw about 57i lbs. of inorganic matter, consisting of — 



Grain. Straw. 



Potash 1-50 lbs. 8-70 lbs. 



Soda 1-32 0-02 



Lime 0-86 1-52 



Magnesia . . . I . 0-67 0-22 



Alumina 0-14 0-06 



Oxide of Iron. . . . 0-40 0-02 



Oxide of Manganese . 0-00 0-02 



Silica 19-76 45-88 



Sulphuric Acid ... 35 ' 0-79 

 Phosphoric Acid. . . 0-70 0-12 



Chlorine 0-10 0-05 



25-80 lbs. 57-40 lbs. 

 If an acre of land yield 50 bushels, each 54 lbs., of oats, and two-thirds* 

 more in weight of straw, there will be reaped per acre, 

 Of grain 2250 lbs., ? ^ . rr^u ui 



Of straw 3750 lbs., I ^'"""^ ^ produce of 50 bushels; 

 and the weight of the inorganic matters carried off will be equal to 2i 

 tunes the quantities contained in the second column, and 3| times those 

 contained in the third column. 



* Oi all kinda of grain, the oat gives the most variable proportion of straw, that which is 

 obtained at one time, and in one locality, being two or three times greater than that reaped 

 in another. 



10 ^ 



