70 



PLANT SUCCESSION AND CROP PRODUCTION 



fourth class, the highest values, show the influence of the cities 

 and towns upon farm land in the spread of the deep shading 

 around the area within which the city is located. It also shows 



K.ELATIVE. LAMD VALUtO 



Fio. 14. Chart of the relative land values in Ohio, 

 the two geological maps. 



Compare with the physiographic and 



the farm land not near large communities which takes its values 

 from the productions of the farms. Darke and Miami counties, 

 for example, near the Indiana line in the southwestern part of the 

 state, and Paulding, Van Wert, and Allen counties, are also shown 



