Nov. 19, 1921 



Ash Content of Awn, Rachis, and Palea 



445 



Minnesota, for instance, the grain was badly lodged and ripened very 

 unevenly. There was also considerable rain at ripening time which 

 delayed the ripening of part of the spikes. That many of these irregular- 

 ities were due to the stage of ripening was apparent in a table published 

 in a previous paper.* In this table the kernels with high ash content 

 are the kernels which weighed less than 50 mgm. In other words, 

 they were kernels in which maturation had been carried to the point 

 where the mechanical loss of water had reduced the wet weight below 

 50 mgm. 



Table VI. — Percentage of ash in kernels 0/ barley from flowering to maturity, compile 

 on the basis of the wet weight 



Days from 

 flowering. 



13- 

 14. 



15- 

 16. 



17- 

 18. 

 19. 

 20. 

 21. 

 22. 



23- 



24. 



25- 



Plot I, 



1917. 



I. 41 



1-39 

 I. 17 

 .90 

 .91 

 .82 

 .90 

 1.03 

 .90 

 •94 



•97 

 I. 01 



•97 

 I. 01 

 I. 01 

 I. 06 

 I. 10 



•99 



04 

 08 



1.07 



Plot 3. 

 1917. 



i^3i 

 .88 



.87 



.76 



I. 14 



•85 

 I. 00 

 I. 14 

 I. 21 



I- 55 

 .82 



•95 

 .92 



I. 04 

 .96 

 .98 

 I. 06 

 I. 04 

 I. 02 

 1.08 

 1.08 

 I. 00 



Plot 4, 

 1917. 



0. 96 



1. 18 



•94 

 •94 

 •97 

 I. 27 

 I. 12 

 I. 00 

 I. 07 

 I. 25 



•95 

 I. 00 



•94 

 I. 10 



•99 

 I. II 



•97 

 1.36 

 I. 14 

 I. 00 



Plot 5. 

 1917. 



I. II 

 .87 



•79 



.78 



I. 12 



•95 

 1.08 



.96 

 I. 04 

 I. 06 

 I. 04 

 1.03 

 I. 12 



.91 

 I. 40 

 I. 06 

 I. 04 



Plot 6, 

 1917- 



0.81 



.76 

 .78 



1.08 

 .90 

 .92 

 .82 



1.49 



I- IS 



1.32 



.90 



•93 



Plot 7. 

 1917. 



.96 



.86 



I. 01 



.94 



.85 



I. i» 



I- 15 



Plot 8, 

 1917. 



2.23 



•99 



I. 61 



I. 07 



.96 



.80 



•94 

 .91 



•73 

 1.03 



•97 



.91 



I. 06 



I. 00 



I. 14 



I. 04 



I. 00 



I. 06 



.91 



.89 



I. 17 



1.23 



Hann- 

 chen, 

 1916. 



0. 62 

 .81 



1. 04 

 •93 



•85 



.87 

 I. 00 

 I. 14 

 I. 04 

 I. 04 

 I. 02 



I. 06 

 I. 22 



1.08 



1-34 

 I. 19 

 I. 19 



1-35 

 1^34 



r-5i 

 I. 62 



Hann- 



chen, 



clipped 



1916. 



79 



.92 

 .96 

 •93 



96 



94 

 06 



15 

 15 



I. 17 

 I. 20 

 1.32 

 I. 26 

 I. 26 

 ^•3i 



I. 21 

 I. 42 

 1-57 



1-75 



Man- 

 churia, 

 1915. 



^•95 



I. 02 



.90 



.84 



.96 



•77 



.91 



I. 02 



1.08 



I. 12 

 1-13 

 1-13 

 I- 13 

 I. 12 

 I. 17 



I. 16 

 I. II 

 I. 29 

 I. 26 

 I. 20 

 1-25 



1-25 

 I. 02 

 1.08 

 I. 41 

 1.79 



Man- 

 churia, 

 clipped, 



1915- 



20 



37 

 30 

 26 



71 



At final maturity, where the base of calculation was reduced by the 

 rapid mechanical loss of water, there was sudden rise in the percentage 

 of ash. This increase is taken to indicate maturity. The taking of 

 samples usually ceased just before the final rapid fall of water content. 

 The glumes began to adhere to the caryopsis several days before maturity. 

 After they commenced to adhere the separation of glumes and caryopsis 



* Haki,an, Harry V., and Ajnthony, Stephen, op. cit. 



