12 



T. Lyttleton Lyon and James A. Bizzell 



ever, during the five-years period embi'aced by these experiments there has 

 been no stoppage of the outlets nor faikire of the soil to drain pioperly. 

 The drainage water has usually come thru entirely free from sediment. 

 Only in the springtime, when the soil is thawing, has there been any tend- 

 ency for the soil particles to come thru the pipes. 



The chemical composition of the soil placed in tanks 1 to 12, as 

 determined by averaging the results of the analysis of six samples, is 

 given in table 3. These were bulk analyses. The methods of making 

 them are stated in the appendix, pages 85 to 87. 



TABLE 3. Chemical Analysis of Soil Placed in Tanks 1 to 12 



Constituents determined 



Nitrogen (per cent) 



Organic carbon (per cent) 



Calcium oxide (per cent) 



Magnesium oxide (per cent) 



Potassium oxide (per cent) 



Sodium oxide (per cent) 



Phosphoric anhydride (per cent) 



Sulfur trioxide (per cent) 



Carbon dioxide (per cent) 



Lime requirement (CaO in parts per million) 

 Lime requirement (CaO in pounds per acre foot*) 



Fourth 

 foot 



0.054 



0.140 



1 . 530 



0.590 



2.4S0 



0.820 



0.131 



0.054 



2.680 











* Calculated from weights of soil given in table 1. 



The soil consists of glacial material reworked by streams and redeposited 

 from glacial lakes. Owing to its sedimentary origin it is comparatively 

 free from stones; the mass of soil used for this experiment contained 

 no stones. In the production of crops the soil responds well to applications 

 of manure and to commercial fertilizers. It is also benefited by lime. 

 Its degree of responsiveness to lime is expressed by the fact that it will 

 raise a fair crop of red clover without the addition of Hme, but alfalfa 

 is a practical failure when no lime has been applied. 



The crops to which this soil is best suited are the small grains, particularly 

 wheat, and such grasses as timothy and bluegrass. Timoth}^ responds 

 remarkably well to fertihzers on this soil. Maize and potatoes are not 

 very successfully produced as the soil is too heavy for crops of that 

 kind. 



12 



