68 Journal of Agricultural Research voi. xxm, No.» 
(5) No effect was produced by the chemicals, other than the nitrogen 
carriers, on the yield of the crop or on the quality of the grain. 
(6) The application of nitrogen at the first two stages caused a de¬ 
pression of the phosphoric-acid content in the grain, as well as in the 
straw. In the light of these results, this depression could not be con¬ 
sidered either as a yield relation nor as a reciprocal relation of the two 
elements in the plant tissues, based on similarity of function. 
(7) The application of nitrogen, at the first two stages of growth, 
caused a marked depression of the ash and silica content in the straw. 
