1922.] Trials of New Varieties of Cereals. 439. 



Wheel 

 trcck 



13 Coulter Drill. 

 (12 Coulters working) 



Drill starts 



Wheel 

 track 



94 in. centre to centre of wheel tracks 



35 in. 

 /\. 



r 



rt A n 



35 in. 







IK 



7 

 in 



7 



inJ 



7 



in 



in 



7 

 in 



12 

 in 



7 



in 



m. in i 



7 



in 



o 



:I n ii. i 



[[rXc ludlc to s f o r h 8 r \* @ s t 



Fig. 2. — Diagram showing Row -spaces. 



The above is the length of the strips to be harvested. The 

 lengths to be drilled should be about 9 ft. more, because it is 

 not possible to start and stop the drill exactly on a line, and 

 also the ends must be trimmed to a straight line across the 

 strips before harvest. Obviously, the precise areas seeded are 

 not important proi ided they are equal and accurately measured. 

 The produce can then be corrected to yields per acre after 

 threshing. 



Where the shape of the field is such that strips of twice the 

 above length are more convenient, half the above number of 

 strips of each race may be sown. Tn this case the length 

 should be somewhat more than doubled and a space of about 

 10 ft. cut out across the middle of the strips in order to make 

 two sets of 10 half-drill-strips of ea^h race. The full length to 



