16 HATCH EXPERIMENT STATION. [Jan. 



It will be noticed that the crop on the phosphatic slag, 

 Mona guano and South Carolina rock surpasses that where 

 dissolved bone-black was used, and that the Mona guano 

 gives nearly twice the product obtained by either the slag 

 or the South Carolina rock. It will be further noticed that 

 the Florida phosphate yields practically the same amount 

 of roots as the plot receiving no phosphate. None of the 

 crops secured this year can be regarded as good. The 

 largest yield, that on the Mona guano plot, is at the rate of 

 rather less than 12 tons per acre. A good crop should be 

 about 20 tons per acre. The results of this year, therefore, 

 although showing marked differences, are not regarded as 

 decisive. The peculiarities of the season produced an un- 

 healthy condition, which interfered with the full action of 

 the fertilizers employed. 



Comparison of Different Phosphates. 



The results of the experiments inaugurated by Dr. Goess- 

 mann for the comparison of difterent phosphates with acid 

 phosphate having proved so interesting and valuable, it was 

 decided to inaugurate another series of experiments, includ- 

 ing a greater number of materials supplying phosphoric 

 acid. It was further thought best to apply these materials 

 upon the basis of equal quantities of phosphoric acid to each 

 plot, rather than on the basis of equal money's worth, as in 

 the experiments planned by Dr. Goessmann. 



The land selected for the experiment was fairly level, 

 with a medium heavy loam. It had been in grass for many 

 years. In April, 1896, it received an application of 600 

 pounds of ground bone and 200 pounds of muriate of potash 

 per acre. The season was very dry, and the grass derived 

 little benefit from the fertilizers. The grass was cut about 

 the middle of June, and the field was ploughed on June 24 

 and 25, 1896, and planted to Longfellow corn. The corn 

 was cut when in the milk, September 26, and weighed as 

 put into the silo. The field had been divided into 13 plots, 

 of one-eighth of an acre each, separated by suitable un- 

 manured strips. The yields of corn in 1896 were as fol- 

 lows : — 



