WHEAT 65 



(5) After the plants from the deeper depths have been up for 

 two or more weeks,' and again at a much later date, carefully dig 

 several plants from plantings made at each depth, and record the 

 distances below the surface at which the principal roots are grow- 

 ing, or depths at which the crown is forming. 



The mature plants. 



(6) If drilled and broadcast wheat are both available, ascertain 

 (by digging the plants) the average number of plants and of stems 

 per square foot of ground surface with each of these two methods 

 of sowing. 



(7) From wheat heading in the field or from dried specimens, 

 record the following data for as many varieties of wheat as are 

 commonly grown in the locality : — 



(a) Average height of plant. 



(6) Average number of stems bearing heads. 



(c) Bearded, beardless, or partly bearded. 



(d) Estimated percentage of upper leaf surface covered by rust. 



(e) Has rust attacked the stems slightly, considerably, or not 



at all? 



(8) From dried mature plants in the laboratory, after being 

 moistened, or from nearly mature specimens from the field, 

 describe in writing each of the varieties indicated by the instruc- 

 tor, as to the following points : — 



(a) Bearded, beardless, or partly bearded. 

 (6) Average length of head. 



(c) Average number of spikelets per head. 



(d) Difference, if any, in usual number of grains per spikelet 



in tip, middle, and base of head. 



(e) Difference, if any, in size of grains in tip, middle, and 



base of head. 



(f) DiEference in size of middle grain in a mesh compared 



with the two outer grains. 



Character of grain. 



(9) For varieties commonly grown in the locality record a 

 description as to each of the following points : — 



