414 



Journal of Agricultural Research 



Vol. XIX, No. 9 



material, the analyses are not always dependable. This is true especially 

 for the first few days after flowering. As may be seen from the table, 

 the weight of the individual kernels was greater at maturity than the 

 weight of all the kernels of a spike at flowering time. In some cases 

 where the analyses were obviously incorrect, the results are omitted. 

 But, despite the small samples, the trend of the analyses is surprisingly 

 uniform and, as the results of the two years are in such close agreement, 

 the results are significant. The nitrogen determination is naturally the 

 least dependable. The results in the ash determinations are more 

 accurate, and there is no reason why the dry matter content should not be 

 absolutely so. The dry weight, nitrogen, and ash per kernel are com- 

 puted by means of the percentages secured in the whole spike. 



Table III. — Summary of data on weight, dry matter, water, nitrogen, and ash in indi- 

 vidual spikes of Hannchen barley in 12-hour periods at Aberdeen, Idaho, in JQ17 



Time. 



Spike. 



Wet 

 weight. 



Dry 



weight. 



Dry 

 mat- 

 ter. 



Water. 



Nitro- 

 _ gen 

 in dry 

 mat- 

 ter. 



Ash 

 in 

 dry 

 mat- 

 ter. 



Wet 

 weight 



per 

 kernel. 



Dry 

 weight 



per 

 kernel. 



Nitro- 

 gen 

 per 

 ker- 

 nel. 



Ash 

 per 

 ker- 

 neL 



July 15: 



7P- 



7P. 

 July 16: 



6 a. 



6 a. 



7P- 



7P- 

 July I?: 



6 a. 



6 a. 



7P- 



7P- 

 July 18: 



6 a. 



6 a. 



6 a. 



7P- 

 July 19: 



6 a. 



6 a. 



6 a. 



7P- 



7P- 

 July 20: 



6 a. 



6 a. 



6 a. 



7P- 



7P- 

 July 21: 



6 a. 



6 a. 



7P- 

 July 22: 



6 a. 



6 a. 



7P- 



7P- 

 July 23: 



6 a. 



6 a. 



7P. 



7P. 

 July 24: 



6 a. 



6 a. 

 7P- 



7 p. 

 July 2s: 



6 a. 



6 a. 

 7P- 



7 p. 



Gm. 



0.0441 

 •0494 



• 0578 

 .0657 

 •074s 

 •0778 



.0807 

 ■0795 

 .1360 

 •139s 



.1767 



• 1477 

 .1964 

 .1940 



.2652 

 .2940 

 .2389 

 .2829 

 .3744 



• 3216 



•3508 

 -3863 

 .3026 

 •3453 



.33(56 



• 3772 

 .4192 



•S163 



• 5996 



•544S 

 •6373 



.6429 



.5810 

 •7469 



• 6699 



.6979 

 •7856 

 .6967 

 .8496 



• 8208 

 .8024 

 •7131 

 •6833 



Gm. 



0.0064 



.0085 



• 0093 

 .0084 

 .0126 

 •0139 



.0149 

 •OI4S 

 .0270 

 •0273 



.0341 

 .0274 

 .038s 

 .0406 



.0540 

 .0637 

 •0516 

 .0651 

 .0619 



.0723 

 .0798 

 .0878 

 .0678 

 .0756 



.0760 

 .0875 

 .1060 



.1328 

 .1558 

 •1395 

 •163s 



. 1800 

 . 1602 

 .2194 

 .1944 



.2150 



.2277 

 .2197 

 .2741 



.2718 

 .2496 

 .2618 



• 22SS 



PercU 

 14- S 

 17.2 



16. 1 

 12.8 

 16.9 

 17.9 



18.5 

 18.2 

 19.9 

 19.6 



19-3 

 18.6 

 19.6 

 20.9 



20.4 

 21.7 



21.6 



23.0 



22.6 



22. 7 

 22.4 

 21.9 



22.6 

 23.2 



25-3 



25-7 

 26-0 

 25.6 



25-7 



28.0 

 27.6 

 29.4 

 29.0 



30.8 

 29.0 

 3I-S 

 32-3 



33-1 

 3I-I 

 36-7 

 33-4 



PercU 



85-5 

 82.8 



83-9 

 87.2 

 83-1 

 82.1 



81. S 

 81.8 

 80.1 

 80.4 



80.7 

 81.4 

 80.4 

 79.1 



79-6 



78.3 

 78.4 

 77-0 

 77-4 



77-5 

 77-3 

 77-3 

 77-6 

 78.1 



77-4 

 76.8 



74-7 



74-3 

 74- o 

 74-4 

 74-3 



72.0 

 72.4 

 70.6 

 71.0 



69.2 

 71.0 

 68.5 

 67.7 



66.9 

 68.9 

 63-3 

 66.6 



Perct 

 3-7S 



PercU 



8.96 

 "5-86 



6-57 

 S-71 



3-77 

 4-26 



4-51 

 3- 08 



4-63 



3-21 



3-79 



1-95 

 3-09 



2.08 



4.18 

 3-09 



3-07 

 2.77 



1.96 



Mgm. 

 1-875 

 1.862 



2.275 

 2.650 

 3.400 

 3.550 



3.050 

 3.400 

 5-909 



5- 592 



8.500 

 6.418 

 7.650 

 8.391 



10. 883 

 12.327 

 11.590 

 14-720 

 13-027 



14.672 

 16.370 

 16.417 

 13.900 

 17.600 



16.820 

 18.560 

 20.655 



25.460 

 26. 142 



■25-555 

 25-492 



32.160 

 29- 630 

 33-345 

 28-891 



31.200 

 31-483 

 33-720 

 34-592 



37.05s 

 35-482 

 34-527 

 37- 100 



Mgm. 



0-272 



.320 



.366 

 .339 



.575 

 .63s 



.564 



.619 



1.176 



1.096 



1.641 

 1.194 

 1.499 

 1.754 



3.220 

 2-675 

 2-503 

 3-386 

 2-944 



3.301 

 3.716 

 3-727 

 3-114 

 3-8S4 



3-801 

 4-306 

 5- 226 



6-543 

 6.797 

 6-542 

 6- SSI 



9.00s 



8.178 

 9-803 

 8.378 



9.610 

 9-130 

 10.622 

 11-173 



12.265 

 11035 

 12.671 

 12.391 



Mgm. 



Mgm. 



