7 



available phosphoric acid in each of the materials used may 

 be stated as follows : 



1. Cotton seed meal, available acid (Po O5 ) . 3. 19 per cent. 



2. Cotton seed, " " " . 1.03 " 



3. Florida ground phosphate " " . 0.32 



4. South Carolina floats, available acid " . 226 " 



5. Acid phosphate, " " " 12.04 " 

 Two qualities of land were selected at the station for the 



field experiments, one a strong red soil, the other a poor 

 sandy soil. The results obtained were as follows on the 

 poor soil the fertilizers were sown broad cast : 



Lbs. seed cotton 

 (per acre.) 



1. 400 lbs. pulverized Florida phosphate 290.5 



2. 800 " " " " 219.8 



3.400 " acid phosphate 196.7 



4. 800 " " " 144.2 



5. No fertilizer 106.4 



6. 400 lbs. Florida phosphate with 400 lbs. 



cotton seed meal 249.2 



7. 800 lbs. Florida phosphate with 800 lbs. 



cotton seed meal 322.7 



8. 400 lbs. acid phosphate with 400 lbs. 



cotton seed meal 252.0 



9. 800 lbs. acid phosphate with 800 lbs. 



cotton seed meal 320.6 



10. No fertilizer 233.8 



Each plot was one-seventh of an acre and the usual pre- 

 cautions were taken to remove disturbing elements and have 

 the conditions of cultivation and growth as uniform as pos- 

 sible. The details of the work were under the immediate 

 supervision of Mr. Clayton, assistant agriculturist. On the 

 strong red soil the fertilizers were applied in the drill with 

 results as follows; 



