On the Advantage of Deep Drainage, 503 



large drain at the ends ; and at the mouth of each large drain a 

 water-meter was placed. The field was drained in the winter of 

 1847-48. It had been 14 years in grass. Its last crop (viz. in 

 1834) was wheat, of which the land produced on an average 33 

 bushels per acre. In the spring of 1848 the field was partly- 

 sown with sandy oats, and partly with black oats got from Essex. 

 The water-meters were set in June, 1848, and were removed in 

 April, 1849. At harvest of 1848 the stooks were counted, and 

 the following was the result : — 



Sandy Oats. 

 On 3 feet and 15 feet drains, 558^ stooks per acre. 

 „ 3 ,, 30 „ 503i 



Black Oats. 

 On 3 feet and 15 feet drains, 562^ ,, 



» 3i„ 30 „ 5421 



These crops, on being thrashed, yielded as follows : — 



Sandy Oats. 

 On 3 feet and 15 feet drains, 44 bushels per acre. 

 „ 31 „ 30 „ 63i 



Weight — 41 lbs. per bushel. 



Black Oats. 

 On 3 feet and 15 feet drains, 521 ,, 



„ 3J„ 30 „ 741 



Weight — 40 lbs. per bushel. 



Some modification of these results was, however, necessary, in 

 regard to the black oats, in consequence of one of the breaks on 

 which it grew having been on nearly one-half of it shaded by 

 trees. That the trees had the effect of considerably lessening 

 the produce, particularly of grain, is evident from the following 

 statement : — 



Black Oats. 

 Break shaded, produced 611 stooks per acre. 

 „ unshaded „ 514^ „ 



„ shaded „ 70| ,, 



„ unshaded „ 34f „ 



If the shaded break is thrown out of view, the result, as regards 

 black oats, would be as follows : — 



On 3 ft. and 15ft. drains, 611 stooks per acre. 



3i and 30 „ 542f „ 



3 and 15 „ 70f bushels ,, 



3j and 30 „ 75f „ 



The quantity of seed sown for both kinds of oats was at the 

 rate of five bushels per acre. The water discharged from the 

 two sets of drains was as follows : — 



From the 3 ft. and 15 ft. drains, 35,711 gals, per acre. 

 „ 3i and 30 „ 46,510 „ 



2 l2 



