FOOD FOR PLANTS 



155 



crops and sod coverings. Potassium is rarely 

 beneficial." 



In Oregon, as reported in Bulletin 141 of the Ore- 

 gon Agricultural Experiment Station, the influence 

 of fertilizers on devitalized trees was tested. The 

 orchards were cultivated but had no cover crops. 

 Starved trees responded to the applications of Nitrate 



Seventeen-Year-Old Mcintosh Orchard at Conyer's Farm. 

 Greenwich, Connecticut. 



of Soda by out-yielding the check trees eleven to one 

 in one orchard, and twenty-four to one in another. 

 Application before blossoms open is recommended in 

 Oregon. 



The Indiana Agricultural Experiment Station An- 

 nual Reports of 1920 and 1921 state that experiments 

 at their station, begun in 1917, have shown remark- 

 able increases in yield as a result of the applications 



