186 



ECONOMIC BOTANY OF ALABAMA. 



ENVfRONMENTTAL FACTORS FOR ALABAMA FORESTS 



R.M.H 1313 



Diagram showing relations of the most important environmental 

 factors in Alabama to the forests and to each other. 



"Soil organisms" means all plants and animals, from bacteria 

 and fungi to moles and salamanders, which live underground or in 

 humus and have some influence on the soil. "Animals" means 

 those which travel above ground and carry seeds or pollen, or feed 

 on plants. "Population" refers primarily to density of population, 

 a simple factor. 



