Seed Wheat. 



39 



A higher yield might have 

 ld have r 



There was no attempt made to secure any particular yield. 



been obtained by placing the drills nearer together, but this would have greatly 

 increased the labour of attending to the weeds, as a workman would be too cramped 

 among rows so near together, and would have had to work more slowly, and there would 

 have been a larger number of accidents. 



FOURTH TRIAL. 

 TABLE of Yields of Grain. (Fourth Trial.-) 



Hudson's Early Purple Straw. 



DISCUSSION OF THE VARIOUS TRIALS. 



In these experiments the trial was always made between equal numbers of seeds. 

 This is of course a different matter from trials between equal bulks of seed, or between 

 equal weights of seed. As stated elsewhere, the reason for adopting the present method 

 was that the method usually practised in improving wheat for seed is that of grading by 

 means of sieves, and the grades thus secured are, as nearly as practice allows, simply 

 seeds of so many different sizes. It seemed, therefore, that it was the relative value as 

 seed of equal numbers of these sizes that it would be most useful to know. 



In order to give data by means of which it will be possible to, in some measure, 

 reason from one system of comparison to another, I have graded some samples of wheat 

 and counted the grains in equal bulks, and also weighed equal numbers of seeds. These 

 comparisons have given the following results : 



NUMBER of Grains contained in equal weights of Purple Straw Seed-wheat of various 



Grades. 



NUMBER of Grains contained in equal volumes of Seed- wheat of various Grades. 



From these figures we may derive the following approximate statements, which are 

 easily carried in the mind : 



1. The 2*50 grade that is, the medium grade contains half as many grains in a given 

 volume as the tailings. 



2. The 3 '25 grade that is, the largest grade contains one-third as many grains in a 

 given volume as the tailings. 



* These tailings contained no split grains, " white-heads," or dirt. 



