QS- 



With ten cent cotton the average piroflts range betweeni 

 ;,.:.36 and |7.26 per acre. 



Whether cotton be priced at six^ e-ight, or ten cents per 

 pound, the average profit per acre was greater with a mix- 

 ture of cotton seed meal and phosphate than with phosphate 

 alone, and still greater when 100 pounds of kainit was: 

 added to this mixture, thus making a complete fertilizer., 



Conclusions and Suggestions. 



These are hascd on these experiments and on results i)nh- 

 lisJied in former bulletins of this station.. 



J. In all sojl belts, except perhaps- on certain grades of 

 rich prairie soil, where tests have been made with cotton 

 under the direction of this station acid phosphate has been, 

 almost universally beneficial. 



2 Kainit is less frequently needed than either acid phos- 

 phate or cotton seed meal, and a considerable proportion of" 

 the soils on which it has been most advantageous lie in the 

 southern part of the State. On soils where cotton is es- 

 pecially liable to ''black rust" and in all parts of the State- 

 in seasons when that disease is especially injurious, kainit 

 is at its best. On most soils, containing much clay, it can 

 be profitably dispensed with. Where needed, an application, 

 of 100 pounds per acre is usually suflQcient for cotton. 



3. Cotton seed meal is highl}- beneficial to cotton on a 

 large proportion of the cultivated area of every soil belt in 

 Alabama. Apparently it is universally needed on uplands^ 

 except on (1) new grounds and (2) on soils containing 

 considerable vegetable matter. 



4. On old soils, as a rule, it is more profitable to employ 

 for cotton a mixture of acid phosphate and cotton seed' 

 meal or of these two and kainit, than to use an equal money 

 ralue of any one of them alone. 



5. The >.i!?i..'il basis for a fertilizer formula for cottoih 



