242 CAMPBELL'S SOIL CULTUKE MANUAL, 



THE LATE J. STERLING MORTON. 

 Nebraska Pioneer, Father of Arbor Day, Secretary of Agriculture. 



growing variety. Planted in this way, the swiftly grow- 

 ing trees act as nurses for the slowly growing trees. Planted 

 thus, black walnut, instead of putting on a scrubby growth 

 and looking like gigantic quince trees when they have 

 reached twenty years of age, run up towards the sun for 



