~New York Agricultural Experiment Station. 



479 



Mechanical Analysis of Type Soil Adapted to the Growth of Lettuce. 



(Atr-Dbied.) 



Size of grains in 

 millimeters. 



Name of parts. 



2-1 Fine gravel . . 



1-.5 Coarse sand . . 



.5-. 25 Medium sand 



.25-. 1 Fine sand 



.1-.05 Very fine sand 



.05-.01 Silt 



.01-. 005 Fine silt 



.005-. 0001 Clay 



Total mineral matter 



Moisture 



Organic matter 



Per cent of 

 each part. 



3.89 



5.39 



10.50 



17.18 



32.08 



15.13 



1.19 



3.10 



88.46 



2.78 



12.72 



103.96 



The mechanical analysis of the Geneva clay loaxn and the sandy 

 .loam which were used in the soil mixtures for Crop IV, made 

 by Mr. E. B. Hart, assistant chemist, from samples which were 

 taken before any manure or commercial fertilizers had been added 

 to them, gave the following restdts. The difference between the 

 weight of the original sample and the sum of the weights of the 

 gravel, sand, silt, clay and organic matter is here classed as un- 

 settled clay and added to the weight of the clay. 



Table V. — Mechanical Analyses of Soils Used fob Lettuce Fobcing. 



(cbop IV.) 



Geneva Sandy 



clay loam. loam. 



Perct. Perct. 



Fine gravel 3.32 0.51 



Coarse sand 5.20 0.69 



Medium sand . . 20.71 9.49 



Fine sand 43.45 77.50 



Very fine sand • .94 2.44 



Silt 7.96 1.60 



Fine silt 1.64 1.23 



Clay *9.86 f3.79 



Organic matter 7.02 2.75 



* Including 1.39 unsettled clay. f Including 1.03 unsettled clay. 



