192 



experi:ment station. 



[Jan. 



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



[Diameter of the grains in millimeters (1 millimeter equals about 1^5 of an 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-. 005; clay, .005-.0001.] 



The greenlioiise cucumber soils given in Table II. are from 

 widely separated localities, and, with the exception- of the 

 organic matter which they contain, are no better adapted to 

 the growth of cucmnbers 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- 



