CROP EOTATIONS 185 



and soy beans or cow peas.) In Ontario the continuous 

 growing of hay in some parts and wheat in others has 

 practically disappeared until now a hoed crop, a grain 

 crop, a hay crop and a pasture crop follow one another 

 in the order named on nearly every farm. 



The above data are among the best available on the 

 value of succession cropping as compared with the con- 

 tinuous use of one crop on the same land. The brief 

 summary is not fair to the continuous method since in 

 the succession plan the crops other than wheat are not 

 necessarily as valuable as wheat. Yet the relative yields 

 are so vastly different that none will attempt to say the 

 practices that produced the larger ones are not by far 

 the better for the countries where the tests were made. 



145. Results of Tests at Saskatoon and Brandon. — The 

 influence of the preceding crop on the yield at Saskatoon 

 was studied during the years 1915, 1916 and 1917 with 

 the following results : — 



Table XVII. — Showing results of three years' tests at Saskatoun 

 of the influence of preceding crop on the yield. 



Av.yield Av.yield Av.yield Av. yield Av.yield Av. yield 



wheat oats barley rye flax peas 



bus. lbs. bus. lbs. bus. lbs. bus. lbs. bus. lbs. bus. lbs. 



After Wheat... 20 — 51 64 — 24 35 — 47 22 — 14 15 — 31 17 — 11 



Flax 23 — 22 62 — 18 38 — 31 24 — 06 14 — 09 20 — 33 



Peas ... 28 — 30 68 — 21 41 — 12 24 — 18 17 — 36 20 — 17 

 ' ' Turnips and 



Potatoes* 29 — 40 66 — 05 40 — 36 24 — 16 16 — 04 17 — 46 



Corn 35 — 57 71 — 23 46 — 38 26 — 35 19 — 42 22 — 14 



Fallow . . 33 — 02 77 — 07 39 — 33 27 — 42 14 — 55t 23 — 35 



The test has been under way only three years and the 

 data are not therefore conclusive. Nevertheless it 



* In the early years of the project half of this plot was planted 

 to turnips and swedes and half to potatoes. In 1917 and 1918 

 one plot was provided and the yield of all crops was very much 

 higher on the potato ground than on the turnip ground. 



t" Flax did not mature satisfactorily on fallow in 1915 hence the 

 low average yield. 



