THE EXPERIMENT STATION 85 



On the basis of money value, Goessmann's conclu- 

 sions appear correct; on the basis of phosphoric acid 

 applied and removed, it is shown by the preceding 

 table that dissolved boneblack led, followed by Mona 

 guano, basic slag, South Carolina phosphate, and 

 Florida phosphate. Brooks sowed Swedish turnips in 

 1897, and found that the Mona guano produced by 

 far the largest yield. 



It may be remarked that this experiment was faulty 

 in that (a) no check plat or plats were included from 

 which the phosphoric acid had been omitted; (6) the 

 ceasing to apply the various phosphates after 1894 was 

 unfair to the dissolved boneblack when the results are 

 based upon crop-yield, it being necessary in order to 

 secure the best returns to apply relatively small 

 amounts of the soluble phosphates each year; (c) the 

 application of definite amounts of phosphoric acid as 

 above stated would have been preferable to money 

 value in judging the relative effects of the several 

 forms as sources of plant-food. 



XII. Experiments with grass-lands to determine the 

 effects of different forms of plant-food on permanent 

 meadows (1889-1895). 



The moist meadow on the east side of the county 

 road was underdrained and divided into four plats. 

 Plat I contained 1.92 acres; Plat n, 1.92 acres; Plat 

 III, 2.41 acres; and Plat IV, 3 acres. 



The first two plats received barnyard manure at 

 first in different amounts, to ascertain its limit of 

 usefulness. In 1892 Plat I received at the rate of 



