Charlock Spraying. 



207 



The crop of clover on the part sown with English seed was 

 rather more than an average for the season, but where the 

 Canadian seed was sown there was very considerably less, 

 the difference being- from 15 to 18 cwt. of green herbage. The 

 Canadian plants were not so strong in growth nor so thick, 

 and there was a larger proportion of stem to leaves. The 

 Canadian clover also differed from the English in not being so 

 strong in growth, and the stems were considerably more 

 hairy, while, although at first it seemed to be more backward, 

 it came into flower and matured more quickly than the 

 English clover. 



Charlock Spraying. 



At the farm of the Midland Agricultural and Dairy 

 Institute, Kingston, experiments have been carried out with 

 solutions of the sulphates of iron and copper of various 

 strengths to determine their action in killing or preventing 

 the seeding of charlock. 



Barley and oats were sprayed either with sulphate of iron 

 (green vitriol) 5 per cent, and 7 per cent, solutions, at the 

 rate of 40 gallons per acre, or with sulphate of copper (blue 

 vitriol) 2 per cent, solution, at the rate of 2 5 and 40 gallons 

 per acre. 



The conclusions drawn from the results are that a 5 per 

 cent, solution of sulphate of iron is as good as a 7 per cent, 

 solution of the same material, when both are applied at the 

 rate of 40 gallons per acre, but that a 3 per cent, solution of 

 copper sulphate, is as good as a 5 per cent, or a 7 per cent, 

 solution of sulphate of iron, if each is applied at the rate of 

 40 gallons per acre. 



A 40 gallon dressing of a 3 per cent, solution of sulphate 

 of copper per acre was better than a 25 gallon dressing of 

 the same strength. 



It was found that sulphate of copper tended to cause young 

 oat plants to flag more than the sulphate of iron did, while 

 sulphate of iron caused more flagging in barley than in oats. 



From these experiments it is held that the best strength of 



