the foliage leaves are thicker than those of the charlock. Both 

 kinds were abundant, and it was found that charlock was more 

 easily destroyed than runch. 



IX. EFFECT OF THE SPRAY ON 

 OTHER PLANTS 



In order to test a solution of Sulphate of Iron on a variety 

 of other plants, Mr. Haydon sowed in pots at the experimental 

 farm at Garforth, seeds of the plants named in the following- 

 table, and sprayed the seedlings with a 12 per cent solution of 

 Sulphate of Iron. 



The only plants seriously affected were beans, mustard, 

 turnips and swedes. Of the last three, which all belong to the 

 same order as charlock and runch, the mustard suffered much 

 more than turnips, while the swedes suffered least. 



The destruction of the beans at Garforth was evidently 

 due to the large quantity of the solution applied. At one of 

 the centres a small plot of beans was treated at the rate of 35 

 gallons per acre without serious damage to the plants. 



