16 



COMPOSITION OF STRAW. 



position of the straws of some of the commoner farm 

 crops, and may be valuable for purposes of reference. 

 The crops are wheat (winter and summer), barley, 

 oats, and rye (winter and summer), and the amount 

 is also calculated in Ib. per ton. The results repre- 

 sent the average of a number of analyses. 1 



COMPOSITION OF STRAW. 2 



From this table it will be seen that the percentage 

 of phosphates is, as has already been noticed, very 

 small. 



1 The following quantities of nitrogen are found in rye, pea, and 

 bean straw : 



Ranging from 



per cent. 



Rye-straw . . . .30 to .73 



Pea-straw . . . .76 to 1.61 



Bean-straw . . . 1.15 to 2.62 

 2 Heiden's Diingerlehre, vol. i. p. 404, 



Average Lb. 

 per cent. per ton. 

 .57 12.76 



1.21 



1.92 



27.10 

 43.00 



