Lysimeter Experiments 



39 



from the limed soil. A similar comparison of the planted and unlimed 

 tanks 3, 5, 6, and 11 with the planted and limed tanks 7, 9, 10, and 12, 

 shows that the former lost an average of 26.25 pounds of nitrogen per 

 acre during the five years, while the latter lost 25.02 pounds. These 

 figures for each tank and each crop are given in table 17 (page 36). 



In order to ascertain whether the lime applications had any effect 

 on the process of nitrate formation on the planted tanks, the yields and 

 the nitrogen content of the crops on the limed tanks may be compared 

 with those of the crops on the unlimed tanks. The yields of dry matter 

 on the unlimed tanks 3, 5, 6, and 11 amounted to 47.34 pounds for the 

 five-years period, while for the same period the yields of dry matter on 

 the limed tanks 7, 9, 10, and 12 totaled 45.78 pounds. Therefore, if 

 there is any increased nitrate formation caused by the lime applications, 

 it is not reflected in the crop yields. On the other hand, the limed field 

 plats duplicating the tank treatments produced a total of 928 pounds 

 of crops during the five-years period, as compared with 851 pounds from 

 the unlimed plats for the same period. 



If the total quantity of nitrogen removed in the crops is taken as a 

 measure of nitrate formation, there also appears to be no effect from the 

 lime. Calculated to pounds of nitrogen per acre in crops, the limed tanks 

 produced 1337 pounds for the five-years period and the unlimed tanks 1345 

 pounds. These figures are given for each tank and each crop in table 18: 



TABLE 18. Nitrogen in Crops, Calculated to Pounds per Acre by Yearly Periods 



39 



