57 



Lee County^ Experijient Station Farm, 



Results of fertilizer experiments in lOOo and 190G are 

 i-eserved for another publication. Expressed briefly the re- 

 sults showed that on gray sandy soil (Norfolk sandy loan), 

 the greatest increase was from potash, next from nitrogen, 

 and the least from phosphate. The latter fact may be due 

 to an accumulation of phosphoric acid brought about by fer- 

 tilization with acid phosphate each year. 



Lee Count v. 2 ^Iiles West of AunuRX. 



John Jackson, 1908. (See Table, p. oS.) 



Gray sandy loam, long in cultivation. 



The largest increase. .~)00 y)onnds per acre, was ^(fforded 

 by plot 9. on which was used 640 pounds per acre of a 

 complete fertilizer. This represents, at 3.2 cents per pound 

 of seed cotton, a not profit of |10.32 per acre above thft 

 cost of fertilizer. Tt should be added that the increased 

 crop as measured by the scales was very much greater than 

 the ap]>earance of the plants would suggest to the eye. 



Every one of the three constituents of the complete ferti - 

 lizer was profitable in this mixture. 



Average yield of seed eotton, unfertilized 560 



Increase of seed cotton when cotton seed meal was added: 



To unfertilized plot 1^^ 



To acid phosphate plot ^^ 



To kainit plot —140 



To acid phosphate and kainit plot 320 



Average increase tvith cotton seed meal 9o 



Increase of seed cotton per acre when acid phosphate was added. 



To unfertilized plot 100 



To cotton seed meal plot °" 



To kainit plot — H^ 



To cotton seed meal and kainit plot 350 



Average increase ivith acid pJcjspha'e "* 



