21 



The accompan^ying- plan shows tlie treatment of, and the results from, 

 the respective plats involved in this fertilizer experiment: 



Experimental cotton plats of the Department of Agriculture at Pittsburg, Tex., 1904. 



Plat I. Five acres. 



Hetty seed. 



Planted April i;3. 



Fertilized, R. P. C.« 300 pounds per 

 acre. 



Cultivated 8 times. 



Hoed '.i times. 



Yield, pounds seed cotton per acre, 

 1,403.8. 



Plat II. Five acres. 



Hetty seed. 



Planted April 13. 



Fertilized, C. B. G.'' 400 pounds per 

 acre. 



Cultivated 8 times. 



Hoed 3 times. 



Yield, pounds seed cotton per acre, 

 997.8. 



Plat III. Five acres. 



Hetty seed. 



Planted April 13. 



Fertilized, R. A. P. '' 320 pounds per 

 acre. 



Cultivated 8 times. 



Hoed 3 times. 



Yield, pounds seed cotton per acre, 

 1,202.8. 



Plat IV. Five acres. 



Hetty seed. 



Planted April 13. 



Unfertilized. 



Culivated 8 times. 



Hoed 3 times. 



Yield, pounds seed cotton per acre, 

 694. 



a R. P. C— A commercial potash compound, analyzing— available phosphoric acid, 10 per cent; pot- 

 ash, 2 per cent. 



b C. B. G. — A commercial cotton boll guano, analyzing — available phosphoric acid, 8 per cent; potash, 

 2 per cent; nitrogen, 2 per cent. 



I'R. A. P.— A commercial acid phosphate, analyzing— available phosphoric acid, 14 per cent. 



212 



