30 SOIL SURVEY OF WAUPACA COUNTY. 
By uniting the soil class with the soil series we get the 
soil type which is the basis or unit of classifying and mapping 
soils. A soil type thus, is a soil which is uniform throughout 
its entire extent in texture, color, topographic position, and 
other physical properties, and having a distinct agricultural 
unity, that is, being adapted to the same crops, and requiring 
the same treatment. It is also uniform in the source of ma¬ 
terial from which it is derived, and the mode of origin which, 
taken together, determine the chemical composition. Since the 
soil type is the unit in classifying and mapping soils, and the 
basis upon which experimental work should be conducted, every 
farmer should be familiar with the soil types on his farm, and 
their leading characteristics. 
