1920.] PUBLIC DOCUMENT — No. 31. 23a 



Fertilizers and fertilizer by-products, 157 



Mixed feeds, 41 



Lime products, 7 



Soils for lime absorption capacity and organic matter tests, . . 137 



Soils for complete analyses, 5 



Total, 347 



(e) Vegetation Tests. 



Pot experiments (24 pots with millet as crop) have been 

 conducted with bacterized peat, to show the crop-producing 

 power of treated peat with and without bacteria. A com- 

 parison of the two peat mixtures was also made by chemical 

 investigation in the laboratory. 



Two field experiments were also made on the peat mixtures, 

 one comprising eight plots with tomatoes, and the other eight 

 plots with potatoes. 



Two field experiments were also made to study the avail- 

 ability of the phosphoric acid in apatite and barium sulfide 

 (Barium-Phosphate). One experiment with potatoes, situated 

 north of the chemical laboratory, comprised fifteen plots, and 

 was a continuation of the apatite experiment of the preceding 

 year. The other was a first-year experiment laid out on the 

 Tillson Farm, comprising thirty-eight plots, with potatoes as a 

 crop. This experiment will be continued for a number of 

 years. 



In addition to the above, a tile experiment was run with 

 dwarf Essex rape as a crop, forty-six tiles being employed. 

 Apatite and barium sulfide were under study in this experi- 

 ment, soil being used which was known to be deficient in 

 available phosphoric acid. The results of the above will be 

 reported in a later publication. 



3. Feed and Dairy Section, 

 Work of the feed and dairy section has been continued along 

 the following lines : — 



