LIME AND OTHER SOIL AMENDMENTS J)9 



the more general farm crops. Notice the large amounts in clover and 

 alfalfa. Common red clover contains more than alsike clover. It is less 

 tolerant of soil acidity than the latter. 



AVERAGE LIME AND MAGNESIA (EQUIVALENT TO CACOs AND MaCOs) IN 2000 LBS. 



OF THE FOLLOWING CROPS. 

 (Calculated from von Wolff's Tables on the Basis of 15 per cent Moisture.) 



Pounds of Carbonates as 



Tolerance to Acidity. Numerous tests at the Pennsylvania Experi- 

 ment Station show that when the lime requirement of the soil is 1500 to 

 1700 pounds of burnt or caustic lime per acre seven inches of soil, red 



THE GROWTH OF RED CLOVER ON AN ACID SOIL AS AFFECTED BY LiME. 1 

 A sour soil is unfriendly to clover. Lime will overcome the difficulty. 



clover fails. This is equivalent to from 2700 to 3000 pounds of carbonate 

 of lime or crushed limestone. A lime requirement of 500 to 1000 pounds 

 per acre does not seriously interfere with the growth of red clover. In 

 ordinary farm practice the acidity seldom becomes sufficiently marked to 

 affect noticeably the cereals and grasses, although these may be indirectly 



1 Courtesy of The Pennsylvania Agricultural Experiment Station. 



