154 EXPERIMENTAL FARMS 



5 GEORGE v., A. 1915 

 SHALLOW PLOUGHING AND SUBSOILING versus DEEP PLOUGHmG. 



This experiment has now been under way for ten years. Two four-year 

 rotations, differing only in the above-mentioned me,thods of preparation for hoed 

 crop, were laid down in 1904. 



ROTATION "s" (shallow PLOUGHING AND SUB-SOILING). 



First year. — Corn or roots. Field manured at rate of 24 tons per acre. 

 Ploughed out of sod previous August, 4 inches deep, subsoiled to a depth of 8 or 9 

 inches and ridged up in late autumn. The land is ploughed shallow or cultivated 

 in preparation for the grain which follows. 



Second year. — Grain. Seeded down with 10 pounds red clover and 12 poimds 

 timothy per acre. 



Third yem: — Clover hay. Cut twice in the season, and the aftermath left on 

 the field. 



Fourth 1/^ar.— Timothy hay. Broken in August and prepared for com or roots, 

 as indicated above. 



ROTATION "v" (deep PLOUGHING). 



This rutation differs from rotation " S " only in the treatment of the timothy 

 hay held in preparation for corn or roots. It is manured and ploughed in August, 

 7 inches deep, top-worked, and ploughed again in late fall, 7 inches deep. 



The average returns for the ten years show a very slight advantage in favov. 

 of the deep ploughing. If there is taken into consideration the fact that whei„ 

 subsoiling is practised a single plough must be used, whereas a two-furrow riding 

 plough may be operated under the deep-ploughing method, the higher cost of opera- 

 tion in the former method would reduce the actual net profits still more. This 

 experiment will be continued, as the res\ilts have not as "yet shown any decided 

 advantage in favour of either method. 



ur 

 e 



Ottawa. 



