480 Report of the Horticulturist of the 



These analyses show that the percentage of organic matter is 

 considerably higher in the Boston soil than in the Geneva clay 

 loam and more than four times as great as in the sandy loam, but 

 in this respect the soils are not comparable, for Mr. Galloway in- 

 forms me that the analysis of the Boston soil was made after a 

 liberal amount of manure had been added to it, while the Geneva 

 clay loam and the sandy loam were analyzed before any manure 

 had been added to them. These analyses may be compared more 

 readily by means of graphic representations. See Plate XLV. 



There is about the same amount of fine gravel and coarse sand 

 in the Boston soil as in the Geneva clay loam, but the latter has 

 twice as much medium sand and two and one-half times as much 

 fine silt as the Boston soil. It has practically none of the very 

 fine sand while the Boston soil has 32 per cent, Of silt, very fine 

 silt and clay combined, the two soils have about the same amounts, 

 but the ^Boston soil has twice as much silt as the Geneva clay 

 loam and the latter has almost three times the amount of clay that 

 is found in the Boston soil. 



The sandy loam shows a very small percentage of clay and of 

 organic matter while it contains over 90 per cent of sand and gravel. 



The clay loam was used as an ingredient of three mixtures in 

 Crop IV, namely, Soils 7, 10 and 11. On Soil 7, which was com- 

 posed wholly of the clay loam, the crop was not nearly as good as 

 it was on either Soil 10 or Soil 11, each of which contained one- 

 third manure. The use of the manure improved the mechanical 

 condition of the clay loam and gave results quite the opposite of 

 those which followed its use on the sandy loam. The best crop 

 was grown on Soil 10, composed of two-thirds clay loam and one-- 

 third manure. In making Soil 11, which contained one-sixth 

 clay loam, one-third manure and one-half sand, this soil mixture 

 was changed by substituting sand for much of the clay loam; but 

 the change was not beneficial, for the lettuce crop was not so 

 good on Soil 11 as it was on Soil 10. It should be remembered 

 that on all soil mixtures of Crop IV which have been considered 



