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ECOLOGY 



distinct aspect to the country. Still there is much over- 

 lapping, and very few plants occur which are unable to 

 exist in either kind of soil. The vegetation on deep, wet 



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DAYS > 



Fig. 215. Curves showing the Different Rates at which 

 Water ascends in Different Soils. 



peat differs from both ; this soil is more exclusive, many 

 species being unable to subsist on it. 



Properties of soils. Different kinds of soil should be col- 

 lected and their properties compared, e.g. sand, loam, clay, 

 lime or chalk soil, humus from a wood, and peat. Take 

 samples of each, dry them, and put them into separate tubes, 



