CEREALS AND PULSE CROPS 



I44I 



Table I. — Continuous vs. Rotation Corn. Twenty Years Work. 



S3'stem 



Treatment 



Applied per acre 



Per crop 



Av. yield per acre-bushels 



p I ist 2nd 3rd 



5-yea s perioij period period 



Average 



yield 



4tli , for 

 period i 20 years 



Continuous . 

 Rotation (i) 



Continuous . 

 Rotation (i) 



Continuof.s . 

 Rotation (i) 



Rotation (2) 

 Rotation (2] 



None . . . 

 None . . . 



Manure . . 

 Manure . . 



) Commercial 

 fertiliser . 



Manure . 

 None . . . . 



5 tons 

 8 tons 



3i-»9 

 25 tons 43.13 

 40.73 

 38.86 



26.26 16.76 

 30.82 



16 tons 



40.11 

 49.52 



IO-43 

 131.04 



34.62 

 59,75 

 28.00 



8.44 

 20.31 



30.22 

 55.83 

 26.83 



250 lbs j I 250 lbs 38.86 39.09 

 320 ibs j 985 lbs 35.78[49.54 53-9i|44.io 

 8 tons once in 3 years on corn 

 Average of 8 unfertilized plots 



15.47 

 28.95 

 37.02 

 51.81 



33.19 

 46.49 



(3) 60.20 

 (3) 3519 



(i) 5-years rotation. — (2) 3-years rotation. — (3) Average for 17 years. 



Table II. — The Value of Manure and Phosphorus. Three-year Rotation. 



year average — a difference no greater than might have been expected had 

 the seed used been identical — while there is a slight decrease in length 

 of ear in the shorteared strain, it has not materially affected the yield. 



12) As a 9-year average, tapering ears have excelled cylindrical 

 ears in yield by 1,65 bushels' per acre. 



13) Eight years continuous selection for bare, as compared with 

 filled tips shows an average difference of 0.34 bushel per acre in favour of 

 filled tips. 



14) Comparing rough with smooth-dented ears (in variety " Cla- 

 rage ") the 7-year average yield favours the smooth type by a gain of 1.76 



