27 



The Fertilizers Used. 

 The following prices are used, as representing approxi- 

 mately the average cash price in local markets during the 

 last few years : 



Per Ton. 



Acid phosphate (14 per cent, available) |14.00 



Cotton seed meal 25.00 



Kainit 15.00 



Prices naturally vary in different localities. Any one can 

 substitute the cost of fertilizers in his locality for the price 

 given above. 



In each experiment two plots were kft unfertilized, these 

 being plots 3 and 8. When these yields differed widely the 

 experiment was classed as inconclusive. The increase on 

 plots 4 to 7 is calculated on the assumption that the gradu- 

 ation in fertility is uniform from plot 3 to ])lot 8. The fol- 

 lowing table shows what kinds and amounts of fertilizers 

 were used on certain ])lots; the number of pounds of nitro- 

 gen, phosphoric acid, and potash supplied per acre by each 

 fertilizer mixture; and the percentage composition and cost 

 per ton of each mixture, the latter being given in 

 order that these mixtures may be readily compared with va- 

 rious brands of prepared guanos. 



Price Assumed for Seed Cotton. 

 The price assumed is -f 14.00 per ton for seed, and 10 cents 

 per pound for lint, a price found by averaging prices of 9, 

 11, 11, and 9 cents per pound i-especitively, for the crops of 

 1904, '5, 'G, '7, and '8. This is equal to 3.8 cents per pound 

 of seed cotton turning out 33 ^3 per cent, of lint. Deduct- 

 ing J>^ cents per pound as the average cost of picking and 

 ginning, and we have left 3.2 cents as the net value per 

 pound of the increase of seed cotton due to f^n'tilizers. This 

 latter is the figure used in all financial calculations. 



