DOMINION EXPERIMENTAL FARMS 151 



4. — Harrow, subsurface pack, harrow, seed, subsurface 

 pack. 



5. — Harrow, surface pack, harrow, seed, surface pack. 



6. — Harrow, combination pack, harrow, seed, combina- 

 tion pack. 



7. — Harrow, seed, harrow. 



8. — Harrow, seed, surface pack. 



9. — Harrow, seed, subsurface pack. 

 10. — Harrow, seed, combination pack. 

 11. — Harrow, seed. 



Sowing on Fall Ploughed Stubble Land. 



C. 



12. — No packer, harrow, seed. 



13. — Subsurface pack in fall, seed in spring. 



14. — Subsurface pack in spring, then seed. 



15. — Subsurface pack in spring, after seeding. 



16. — Surface pack in fall, seed in spring. 



17. — Surface pack in spring, then seed. 



18. — Surface pack in spring after seeding. 



19. — Combination pack in fall, seed in spring. 



20. — Combination pack in spring, then seed. 



21. — Combination pack in spring after seeding. 



22. — No packer, harrow, seed. 



23. — Surface pack in fall, seed, surface pack. 



24. — Subsurface pack in fall, seed, subsurface pack. 



25. — Combination pack in fall, seed, combination pack. 



To carry on this work, 75 plots are necessary, three groups 

 of 25 each. Each year the experiments on summer-fallow are 

 tried on the group under summer-fallow the previous year. 



A three-year rotation is followed: — 



1st year — Summer-fallow. 

 2nd year — Wheat. 

 3rd year — Wheat. 



Manure applied 6 tons per acre on stubble of second crop 

 after summer-fallow, that is, fall previous to summer-fallow. 



Method of summer-fallowing: — Fall disc, plough before 

 June 15th, cultivate as necessary; plots 1 to 14 inclusive, and 

 21 to 25 inclusive. In case of plots 15 to 20 inclusive, summer- 

 fallow as indicated in Exp. No. 10. Section A. 



