THE WOODLOT 33 



moisture and food from the soil. This interlacing of the 

 roots of trees is often of great value in preventing the soil 

 on steep slopes from being washed away by rains or floods. 

 A certain kind of soil may be more favorable to one kind of 

 tree than to another. The chestnut, while it will live and 

 develop on limestone soil is not able to compete naturally 

 on such soil against the oaks, and other trees associated with 

 them. These other trees are better adapted to the limestone 

 soil and so will crowd out the chestnut. 



THE DIFFERENT KINDS AND FORMS OF WOODLOTS 



Farm woodlots are of many kinds and forms. These are 

 the result of the method of treatment and the method of 

 cutting the trees. It would be difficult to find two woodlots 

 just alike or that have received the same treatment. All wood- 

 lots can be included, however, under a few general heads. 



Kinds of Woodlots as to Species of Trees. — ^A woodlot 

 has a pure stand of timber if it contains but one kind of tree. 

 Such a woodlot would be hard to find. Nearly all woodlots 

 contain more than one kind of tree, although there are many 

 woodlots made up nearly of one kind. It is usual to consider 

 a wooodlot as having a pure stand if more than 80 per cent 

 of the trees are of one kind. 



A woodlot has a mixed stand of timber if it is made up 

 of several kinds of trees, no one of which forms more than 

 80 per cent of the whole stand. 



Kinds of Woodlots as to the Number of Trees Present. — 

 Woodlots are dense, open or fully stocked according to the 

 number of trees per acre. When a woodlot has just enough 

 trees on a given area so that the crowns of the trees meet 

 and fully cover and shade the ground, and so there is sufficient 

 crowding between the trees to produce rapid height growth 

 and trees of good form, the woodlot is said to be fully stocked. 

 If the trees are crowded so closely together that the crowns 



