4:0 HEMP OATS ORANGES. 



1889. 

 By M. a. Scovell, Director. Bulletin No. 27. Soil — Very much 

 worn, and would be considered by most farmers unfit for hemp. 

 From the year's experience, our conclusions are: 

 *'i. That hemp can be raised successfully on our worn blue- 

 grass soils with the aid of commercial fertilizers. 



**2. That a commercial fertilizer containing about 6 per cent, 

 available phosphoric acid, 12 per cent, of actual potash, and 4 per 

 cent, of nitrogen (mostly in the form of nitrate of soda or sulphate of 

 ammonia) would be a good fertilizer for trials." 



1895. 

 By M. a. Scovell, Director. Bulletin No. 55, page 54. 



"The only conclusion drawn is, the results strongly indicate that 

 nitrogen and potash were needed on the plots for hemp." 



OATS. 



TENNESSEE, 1889. 



Experiment by C. S. Plumb. Bulletin No. 2. Soil — Light loam of 

 clayey character. The highest yield, amounting to 51 bushels, was 

 produced by the simple application of muriate of potash. 



Conclusions: "That the two plots fertilized with potash gave the 

 highest yields." 



ORANGES. 



FLORIDA, 1892. 



By J. M. Pickel and J. J. Earle. Bulletin No. 17. 



"The orange draws potash from the soil in far larger quantity 

 than any other constituent. That is, however, precisely that constitu- 

 ent which is relatively deficient in popular orange fertilizers now on 

 sale in Florida. These fertilizers contain from i to 2.5 times as much 

 phosphoric acid as potash and 2 to 5 times as much phosphoric acid 

 as nitrogen. Whereas, according to our analyses, the orange takes 

 from the soil 6 times as much potash and 1.6 as much nitrogen as 

 phosphoric acid (in the case of the California orange, 4 times as much 

 potash and 3 times as much nitrogen). That one of these three most- 

 important constituents, of which the orange removes the least, the one, 

 moreover, which is most likely to be present, and often actually is 

 present in Florida soil in excessive abundance, namely, phosphate, is 

 the one which thes© fertilizers supply in excess. A fertilizer which 



