122 



MASS. EXPERIMENT STATION BULLETIN 161. 



of lime to the soil, and it was also thought that the iron oxide would be 

 modified somewhat by it. The results of the analytical work are given 

 in Table II. 



Table II. — Composition of Clover {Dry Matter) (Per Cent.). 



Plot 4. 



Plot 5. 



Plot 6. Plot 7. Plot 8 



Ash, . . i 



I 



Ferric oxide, . \ 



I 



I 

 Calcium oxide, i 



Nitrogen, 



f Limed, 

 [ Unlimed, 



Limed, 

 [ L'nlimed, 



Limed, 

 I, Unlimed, 

 f Limed, 

 [ Unlimed, 



10.39 

 10.82 

 .06 

 .09 

 1.63 

 1.95 

 3.53 

 3.06 



10.64 



10.68 



.15 



.20 



1.85 



2.05 



3.57 



2.74 



10.35 

 10.51 

 .11 

 ,09 

 1.99 

 2.46 

 3.66 

 2.64 



10.85 

 11.16 

 .12 

 .16 

 1.90 

 2.43 

 3.39 

 2.80 



10.92 

 11.40 

 .09 

 .12 

 2.01 

 2.51 

 3.73 

 2.88 



Composition of Clover Roots {Dry Matter) {Per Cent.) 



The composition of the samples of clover from the limed areas proved 

 to be more uniform than the composition of samples from the unlimed, 

 the range of percentages between maxima and minima being narrower 

 in the constituents of the former series. The mineral constituents are 

 slightly higher in the clover from the unlimed areas, and tliis is most 

 positivel}^ defined in the percentages of calcium oxide. On the other hand, 

 the nitrogen is markedly lower in the unlimed group of samples. 



The composition of the roots differed somewhat from that of the tops. 

 The constituents determined, except iron oxide, were much lower in 

 percentage than those in the tops. The percentages of nitrogen varied 

 in the same manner as in the tops, while calcium oxide was higher in the 

 roots from limed areas, and tlie iron oxide was higher in those from un- 

 limed areas. 



