1909.] PUBLIC DOCUMENT — No. 31. 17 



The sulfate of potash and basic slag meal might with advan- 

 tage be mixed, and ap])lied in the autumn or very early spring. 

 The other materials should be mixed, applied after the prep- 

 aration of 'the soil is nearly finished and lightly harrowed in 

 just before planting the crop. 



