). — (Eradication of Weeds by Spraying with 

 Solution of Metallic Salts.) 



Bui. Agr. (Brussels.) 1889, pp. 345 et suivantes. 



Plots of oats were treated with the following solutions : 



A. 4 kgo. Sulphate of copper to 90 I. of water. 



B. 3 kgo. do. do. 91.5 1. of water. 



C. 3 kgo. Sulphate of iron to 20 1. of water. 



Using the first solution the results were completely satisfactory; 

 using the other two solutions the results were not satisfactory. 



In experiments made in Limbourg a 4 per cent solution of sulphate 

 of copper and a 12 per cent solution of Sulphate of Iron were 

 efficacious. 



In the province of Namur experiments with oats led to the following 

 results : 



A. The most favorable time for the destruction of wild mustard 

 with saline solutions corresponds with the appearance of 

 the fifth or sixth leaves. 



B. That sulphate of copper is more active than Sulphate of 

 Iron. From the point of view of economy the S. of I. is to 

 be recommended over the sulphate of copper. 



C. The result of all the experiments is that a 20 per cent solu- 

 tion of Sulphate of Iron gave the best results. 



Note — The reference source is erroneous. 



