102 



HATCH EXPERIMENT STATION. 



[Jan. 



(1890 to 1893, inclusive). Since 1893 no phosphate has 

 been applied to any part of the field. All plots from the 

 beginning were liberally manured Avith materials furnishing 

 nitrogen and potash, and this manuring has continued oji an 

 even more liberal scale since 1893. The amounts of phos- 

 phoric acid supplied the several plots, the basis being equal 

 money's worth, have of course varied widely. They are as 

 follows : — 



Plot 1, phosphatic slag, .... 



Plot 2, Mona guano, 



Plot 3, ground Florida rock pliosjjhate, 



Plot 4, ground South Carolina rock phosphate, 



Plot 5, dissolved bone-black, 



Pounds. 



96.72 



72.04 



165.70 



144.48 



49.36 



The crop this year was cabbages, variety, Solid Emperor. 

 The yield is shown in the following table : — 



Comparison of Different Phosphates — Yield of Cabbages. 



Balance includes many small, hard heads, but too small for market. 



The difl^erences are very large, the ground South Carolina 

 rock standing first, the phosphatic slag second, the Mona 

 guano third, the dissolved bone-black fourth and the Florida 

 phosphate last. The no-phosphate plot produced practically 

 nothing. The plots are about one-seventh of an acre in 

 area, and no plot has given what could be called a good 

 crop. Last year the field was in oats, and there was but 

 little difference between the yields of the different plots. 

 The yield on all, even on the no-phosphate plot, was good. 



In 1898 the crop on this field was corn, and the yield was 

 good upon all plots except the no-phosphate plot and the 



