COMPOSITION OF 8OIL8 87 



sandstone soils contain little lime? 10. What is a general 

 characteristic of limestone soils? 11. With what element 

 is the calcium in soils usually combined? 



PROBLEMS 



' 1. A sandy soil weighs 110 pounds to the cubic foot, and 

 contains 0.04 per cent of lime. Calculate the total weight 

 of lime in an acre of such soil one foot deep. 



2. A rich loamy soil weighs 90 pounds to the cubic foot 

 and contains 0.60 per cent of lime. Calculate the weight 

 of lime in an acre of auch soil one foot deep. 



