22 



(3) acid phosphate alone, showing by analysis 14 per cent available 

 phosphoric acid. 



The following table shows the treatment given and the yield from 

 the several plats, together with the increased yield from the use of 

 fertilizers and improved seed, as compared with the yield of cotton 

 from ordinary gin seed. 



aC. B. G. — A commercial cotton boll guano; analysis — available phosphoric acid, 8 per cent; 

 potash, 2 per cent; nitrogen, 2 per cent. 



6R. P. C. — A commercial potash compound; analysis — available phosphoric acid, 10 per cent; 

 potash, 4 per cent. 



cR. A. P.— A commercial phosphoric acid; analysis— available phosphoric acid, 14 per cent. 



Table IV, which follows, shows the comparative earhness of fruit 

 maturity on the several plats. The amount of seed cotton picked 

 from each plat during each month is followed by the total amount 

 picked from said plat to the end of that month. 



Table IV. — Comparative earliness of fruit maturity on plats on bollworm experi- 

 ment farm of U. S. Department of Agriculture at Ardmore, Ind. T., 1905. 



290 



