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PRINCIPLES OF AGRICULTURAL CHEMISTRY 



The acid soils (Nos. 23 and 27) give smaller yields with these 

 crops than the limed soils. The nitrate of soda plot, which, as 

 stated, has a tendency to become basic on account of the basic 

 residue left when the nitrogen is taken up, gives better yields than 

 the ammonium sulphate plot, which has a tendency to become 

 acid. 



Effect of Lime on Crops an Acid Soil. 1 Benefited by Lime. 

 The following gives the ascertained effect of lime on various 

 crops as found by experiments such as described above : 



Fig. 61. Sorghum on acid soil, (A) limed and nitrate of soda, (B) unlimed 

 and nitrate of soda, (C) limed and sulphate of ammonia, (D) un- 

 limed and sulphate of ammonia. Rhode Island Station. 



Alfalfa, asparagus, barley, beets, clover, celery, cauliflower, cur- 

 rants, cabbage, cucumbers, corn, lettuce, mangelwurzel, onions, 

 okra, oats, peas, peanuts, pepper, parsnip, pumpkin, sorghum, 

 salsify, seed fruits, stone fruits, squash, spinach, sugar beets, salt 

 bush, timothy, and tobacco. 



1 Wheeler, Farmers Bulletin No. 77, U. S. D. A. 



