1895.] PUBLIC DOCUMENT — No. 33. 283 



2. Experiments with Phit>adelphia Tankage and Dried Bi.ood 



AS A Nitrogen Source for the raising of Winter Grain 



(Rye). 



Bt C. a. Goessmann. 



1893-94. — The experiments described below were carried 

 on for the purpose of comparing the vahie of dried blood 

 and Philadelphia tankage as a nitrogen source for the raising 

 of winter rye. The soil used in the experiment was obtained 

 from a locality not under cultivation, and was carefully 

 screened before use. Six boxes were filled, each with about 

 seventy-five pounds of the earth. 



Boxes 1 and 4 were fertilized with 180 grams of the fol- 

 lowing mixture : — 



Parts. 



Double superphosphate, 40 



Muriate of potash, 100 



Dried blood, 100 



Boxes 2 and 3 were fertilized with 180 grams of the fol- 

 lowing mixture : — 



Parts. 



Double superphosphate, ......... 40 



Muriate of potash, 100 



Philadelphia tankage, 100 



The other two boxes received no fertilizer addition. 



Sept. 21, 1893, winter rye was sown in the boxes. This 

 began to appear above ground September 25, and October 12 

 the plants were thinned to five in a row, three rows in a box. 

 During the winler the boxes were kept in the unheated por- 

 tion of the vegetation house, and, to get as nearly as possi])le 

 the outside conditions, snow was placed on the boxes at 

 intervals, its melting furnishing the only water the boxes 

 received during the winter. At the opening of spring the 

 boxes were again regularly watered, during the summer 

 receiving about four hundred culiic centimeters of water daily. 

 No very striking diiferences were noticed in the appearance 

 of the fertilized boxes, the average height being about thirty- 

 six inches. The boxes receiving no fertilizer averaged thirty 



