W. E. BllENCIILEY AND A. D. HaLL 



207 



but the wheat from plot 10 is exceptionally nitrogenous for the variety, 

 and at the same time exceptionally poor in phosphoric acid. 



Other determinations. A certain number of determinations were 

 made in order to asertain if any marked change could be found in the 

 nature of the materials accumulated in the grain, by which the degree 

 of ripeness could be gaugetl. Fig. 11 shows the percentage of sugar 



% 



Plot 10 

 Plot 3 

 R F. 



Fig. 11. °/o dextrose in dry matter of grain, 1907. 



(dextrose) in the dry matter of the grain : it is high at first, about 

 15 per cent., but falls rapidly to about 2 per cent., at which figure it 

 keeps fairly constant for the last fortnight before cutting. On recal- 

 culating to ascertain the amount of dextrose per 1000 grains (Fig. 12) 



Plot 3 

 R.F 



9 12 15 10 21 24 27 30 33 33 39 days 



Fig. 12. Actual dextrose in 1000 grains, 1907. 



