256 LESSONS IN AGRICULTURE 



gles, the same distance apart. Plant the Catalpa seed- 

 lings at the intersection of the furrows. These little 

 trees will he six feet apart and there will he ahout 

 1,000 trees on the acre. The trees must be cultivated 

 three or four times during May and June. In July 

 sow to cowpeas, vetch, or clover to serve as a winter 

 cover crop. Keep up this system of cultivation and 

 cover cropping for three or four seasons, or until the 

 trees shade the entire ground beneath them. They will 

 probably need some pruning to keep the stems straight 

 and from forking too badly: If the wind blows any 

 trees over or they persist in growing crooked, cut the 

 trees off at the ground and new, strong, straight trees 

 will grow from the roots. 



For a school exercise any smaller area planted in this 

 manner will serve. The author strongly recommends 

 the use of this exercise in the rural schools. 



D*aw a plot of the ground and show the position of 

 the trees. 



NOTE. Black Locust, White Willow, Osage Orange, 

 and Yellow Poplar are good woodlot trees to plant and 

 they yield quick returns. 



3. An Excursion t~ the Woods 



Let the class and teacher take a walk to the woods. 

 Make notes of your observations on the following points : 



1. The comparative temperature within and without 

 the woods. 



2. The rich humus soil of the forest floor, and how 

 the roots and leaf mould hold the moisture and pre- 

 vent washing. Point out examples of washes where 



