EXPERIMENT STATION BULLETINS. 501 



TMiere soils are low in lime the followiuir %egetables are known to re- 

 spond to its use: Pepper, parsnips, salsify, squash, spinach, red beet, 

 celery, cauliflower, lettuce, and onion. Many plants grown for their 

 blossoms also respond to lime. 



SOME RESULTS FROM THE USE OF LIME. 



Lime may be utilized with ample margin of profit on so-called so\ir 

 soils. Experiment station workers in many states by menus of well- 

 planned and carefully conducted field trials have shown conclusively 

 that the use of lime on such soils is sound practice. For example, 

 Thorne and co-workers of the Ohio Agricultural Experiment Station 

 have made many valuable contributions to our knowledge of tlie lime 

 relationships of soils and crops. 



Wiancko and others, of the Indiana Agricultural Expojinient Station 

 report that three-fourths of the soils in the State are in need of lime. 

 "WTiere ground limestone has been used on the e\periinontal farms it 

 has returned safe margins of profit. 



The results of Illinois experiments, on soils deficient in lime, con- 

 ducted by Hopkins and associates, show very strikingly that many soil 

 must be liberally treated with lime l)efore they can be permanently ijii- 

 proved. Hopkins, (1912) in commenting upon the results of some 145 

 tests in six counties, states that the value of tlu^ increase lias lieen about 

 four times the cost of the regular applimtion (»f two tons of limeslone 

 per acre every four years. 



Whitson and a.ssociates of the University of V/isconsin. )iy means of 

 many field experiments as well as laboratory investigations report that 

 soils deficient in lime are quite common in Wisconsin and strongly 

 recommend its use on such for their improvement. 



Several experiment stations more remote from ^lichigan have made 

 contributions to this subject, notably, Delaware, ^rarylniul. Xew Jersey, 

 Rhode Island. Massachusetts. Pennsylvania. Tennessee and ^lissouri. 



Reports from several county agricultural agents and many farmers in 

 different sections of Michigan, as well as results obtained from lecently 

 inaugurated field tests indicate that the use of lime on the majority 

 of our soils is profitable. 



Liming where needed increases the efficiency of fertilir.ers r,nd stable 

 manure. Many are the reports to the effect that commercial forms of 

 plant food are unsatisfactory without lime. Some of our recently 

 inaugurated field tests also show that lime may greatly increase the 



