494 INVESTIGATION BY CULTURE EXPERIMENTS 



TABLE 104. ALABAMA FIELD EXPERIMENTS, 1905-1908 

 Averages per Acre per Annum 



SEED COTTON PER ACRE, POUNDS 



INCREASE OF SEED COTTON PER ACRE, POUNDS 



VALUE OF INCREASE PER ACRE (AT 3.2 c. PER LB.) 



1 The nitrogen is regularly applied in 200 Ib. of cotton-seed meal (at $25 a ton), 

 which also contains about 2 Ib. of phosphorus and 3 Ib. of potassium. The phos- 

 phorus is applied in 240 Ib. of acid phosphate (at $14 a ton) and the potassium in 

 200 Ib. of kainit (only 100 Ib. on plot 10), costing $15 a ton. These are the prices 

 reported in Alabama Bulletin 145, February, 1909. 



