64 



HATCH EXPERIMENT STATION. 



[Jan. 



of ten typical surface soils from various parts of the State 

 between the Cape and the New York State line : — 



Table I. — Shoiving the Mechanical Analyses* of Ten Massachu- 

 setts Soils, extending from Cape Cod to Western Massachusetts. 

 — Average Percentage of Organic Matter, Gravel, Sand, Silt 

 and Clay in 20 Grams of Soil. 



[Diameter of the grains in millimetres (1 millimetre equals about Vas inch) : gravel, 

 2-1; coarse sand, 1-.5; medium sand, .5-. 25; fine sand, .25-. 1 ; very fine sand, 

 .1-.05; silt, .05-. 01; fine silt, .01-. 006; clay, .005-. 0001.] 



* Analyzed by A. A. Harmon and Asa 8. Kinney. 



The first si.x: soils represent typical samples taken from 

 affected fields in locations where the summer stage of the rust 

 has always been present since its occurrence in Massachusetts, 

 and in most instances where it has been severe. The other 

 samples are from towns which have not shown the summer 

 stage of the rust, but in which the fall stage has occurred. 

 All of the samples are so-called surface soils, and represent 

 single analyses. Except in the Amherst soils they represent 

 an average of four analyses, while in the Pittsfield there is 

 an average of two. A careful examination of the table will 

 show considerable diflerence in the texture of the soils of the 

 various regions. It will be observed that the coarse elements 

 are much more common in the coast soils than in the inland 

 soils, and conversely that the fine elements are greatly in- 

 creased in the inland soils. 



