34 FARM FORESTRY 



are much restricted and the growth of the trees retarded, 

 the woodlot is said to be very dense or overcrowded. When 

 a woodlot contains a fewer number of trees than are needed 

 to shade the soil, the woodlot is said to be open. 



Kinds of Woodlots Based on the Age of the Trees. A 

 woodlot in which all the trees are of approximately the same 

 age is called an even-aged woodlot. When the woodlot con- 

 tains trees of many ages mixed in together it is called a many- 

 aged woodlot. Woodlots are also divided into mature, imma- 

 ture and overmature stands according to their development. 

 Second growth timber is so called to distinguish it from the 

 old mature trees, especially the old virgin trees, of which so 

 few remain. Such timber where the stand is not fully stocked 

 is apt to be very limby, due to the lower branches remaining 

 alive and hanging on the tree a long time before being pruned 

 off naturally. 



Kinds of Woodlots Based on the Form of the Woodlot. 

 A woodlot is said to have a regular stand of timber if all 

 the trees are .of about the same height, the crowns of the trees 

 forming a single canopy. Where some of the trees are of 

 one height, their crowns forming a canopy, and the rest of 

 the trees form a second canopy at a different height, the wood- 

 lot is called a two-storied woodlot. Such a woodlot may 

 result from the trees being of two different ages widely sepa- 

 rated, and also may result from the trees having different 

 degrees of tolerance and rates of growth. An irregular stand 

 of trees or woodlot is one in which the trees are of different 

 heights, their crowns being mixed together, giving an irregular 

 appearance. 



Kinds of Woodlots According to the Origin of the Trees. 

 When the trees in the woodlot have all sprung from seed it 

 is called a seed forest or high forest. If the trees in the 

 woodlot come from sprouts, it is a sprout forest or coppice 

 forest. Where the woodlot is composed of both seedling trees 

 and sprout trees, it is a composite forest. 



