92 



2. Roots clipped off each plant and the whole selected product of each 

 plot weighed. 



3. Average weight per plant estimated. 



4. All plants from a given plot threshed by hand and the threshed 

 product weighed. 



5. The weight of grain and straw per plant estimated separately on 

 above basis. 



6. Percentage production of grain from whole product estimated. 



7. Weight of 1,000 representative kernels taken. 



8. Hectolitre (2 . 85 bushels) weight of average sample taken. 



9. Examination of grain for plumpness, character of scale, etc. 



On the basis of the above analysis together with notes taken in the 

 field regarding such matters as strength of straw, date of maturity, etc., a 

 very considerable reduction in the number of these plots is made. 







Photo by L. H. N. 

 FIG. XIX. Dr. Nilsson-Ehle, taking notes on preliminary Autumn Wheat plots, July 30. 



The larger sized plots in the series of preliminary trials usually occupy an 

 area of 12.50 square metres, being 1 metre (39.37") wide by 12.50 metres 

 (40.3') long. In some cases a greater length is allowed. These plots are 

 sown with a small two-drill machine, the drills being 15 c.m. (5.85") apart, 

 thus allowing six drills to each plot. Into these larger plots are carried 

 practically all sorts which have survived the tests of the smaller series, in 

 order that a more accurate comparison of yield may be made. Here again 



