Experiment Station Report . 



21 



Table II. 



Sound Corn, 

 lbs. 



Soft Corn, 

 lbs. 



Total Corn, 

 lbs. 



.Stalks, 

 lbs. 



0, . 



1, • 

 3, . 

 5, . 



7, . 



13 ,. 



19, . 



207.5 

 170.0 



83.0 

 75.0 



83.0 

 85.0 



94.75 

 S2.5 



85.0 

 135.0 



79.5 

 85.0 



67.25 

 87.5 



88.5 

 1300 



122.5 

 197.5 



115.0 

 210.0 



119.0 

 195.0 



101.25 

 217.5 



91.25 

 177.5 



123.5 

 195.0 



296.0 

 300.0 



205.5 

 272.5 



198.0 

 295.0 



213.75 

 277.5 



186.25 

 352.5 



170.75 

 262.5 



190.75 

 282.5 



447.5 

 1305.0 



345.0 

 1000.0 



320.0 

 900.0 



345.0 

 925.0 



315.0 

 950 



Drainage Waters from Experimental Corn Plats. 



As au introduction to this subdivision of my report, it 

 may be well to make a condensed statement of some of the 

 results of the latest researches in regard to the relations of 

 the soil to the supplies of plant food which have prompted 

 me to give such prominence to the investigation of drainage 

 waters in the " Plan of Experiments," drawn up for the con- 

 sideration of the Board of Control. 



It has long been known that nitrogen, in some form, was 

 essential in the processes of plant-growth, but its immediate 

 source and the form in which it could be appropriated were 

 matters of conjecture only, while the abundance of free 

 nitrogen in the atmosphere furnished the basis of hypotheses 

 that have not stood the test of experimental investigations. 



The researches of Boussingault, in connection with the 

 later and more exhaustive experiments of Lawes and Gilbert 



