192 



EXPERIMENT STATION. 



[Jan. 



Table I. — The Mechanical Analyses of Some Market-garden Soils. 



[Diameter of the grains in millimeters (1 millimeter equals about 'Y25 of an inch) ; 

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

 .l-.Oo; silt, .05-. 01; fine silt, .01-. 005; clay, .005-. 0001.] 



The greenliouse encumber soils given in Table 11. are from 

 widely separated localities, and, with the exception of the 

 organic matter which they contain, are no better adapted to 

 the growth of cucumbers than soils which may be selected 

 from other places. One special feature, however, in connec- 

 tion with these soils is the large amount of organic matter 

 which they contain, which greatly modifies their texture. 

 Most greenhouse soils are rich in organic matter, which is 

 furnished by the extensive use of horse manure and de- 



