1911.] PUBLIC DOCUMENT — No. 31. 23 



that the latter sui)plies a large aiiiouiit of magnesia as well as 

 j)otash, and that it is not unlikely that this, while inferior to 

 ])otash in its effects upon clover, may nevertheless exert an in- 

 Hiience favorable to its more vigorous development. 



Season for Top-dressino. 



For level pastures it is the writer's belief that top-dressing 



with a mixture of slag meal and a potash salt had best be done 



in the autumn, but in all cases where the slopes are excessive 



it will be preferable to apply the materials in the early spring. 



