EXPERIMENT FARM AT SOUTHERN PINES, N. C. 49 



bushels. The next illustration shows results from a plot to 

 which phosphoric acid and nitrogen were applied. 



The yield amounted to 43 bushels per acre. As will be 

 seen from the picture, the amount of first-class potatoes is 

 considerably larger than obtained from the unmanurcd 

 plot. The next illustration shows the actual yield obtained 

 from a plot treated as the preceding one, but with the 

 addition of potash. 



The yield from this plot was 176 bushels per acre. 



It must be noted that the plots represented in the two 

 preceding illustrations were treated with what may be 

 considered a moderate application of potash, phosphoric 

 acid and nitrogen. On other plots this application of the 

 three plant foods was doubled and trebled, and the illustra- 

 tion represented on page 48 shows the actual yield obtained 

 on the plot which received the highest application of a 

 complete fertilizer. The yield was 628 bushels per acre 



As it may be of interest, it is stated here that the 

 actual fertilizer per acre used on this plot consisted of 



480 Ibs. Muriate of Potash, 

 1200 Ibs. Acid Phosphate, 

 750 Ibs. Nitrate of Soda. 

 Total, 2430 Ibs. 



This quantity of fertilizer used per acre is much more 

 than ordinarily would be applied upon the farm ; it is what 

 is considered excessive, nevertheless, in this particular in- 

 stance the excessive application was both useful and remu- 

 nerative. An adjoining plot, to which only f of this 

 amount (1620 Ibs. in ail) was applied, produced 506 bushels 



