January, 1922 



GROWTH OF TREE SEEDLINGS AND WHEAT 



75 



The effect of humus showed in the color of the plants, those on the mixture 

 being slightly darker than those on the sand, which were a yellowish green, 

 while those on the humus were bluish green, indicating greater thrift and 

 vigor. 



e 

 ^•3- 



'r^ 



\f\/heat sown June iz.cut July 6 



imezi Jviyz. 7 junezz Juijz 



Ligfic Line 



Fig. 5. Wheat, rate of growth in height, and green and dry weights, on the three 

 soils of the three series. Green and dry weights are in upper left hand corner and 

 on extreme right of figure. Shows less injurious effect of heavy lime as compared 

 with coniferous trees (except cedar). 



