8 The Bulletin. 



two methods of application did. The other two methods of applica- 

 tion were practically equal in increased yields and profits. 



11. Where 400 pounds is used to the acre the best and most eco- 

 nomical method of application is in the drill before planting. 



12. Our soil analyses of the various soils of the State indicate that 

 these results will apply to the red (cecil) clay loams or red (cecil) 

 clays and valley soils of the Piedmont section of the State. 



13. For the production of cotton on these soils, taking the results 

 here reported as a whole, it is recommended that at least 400 pounds 

 of fertilizer be used and as much more as can be afforded up to 

 1,000 pounds per acre. The fertilizer can be most profitably applied 

 in the drill before planting, though there is no objection to dividing 

 the application into two parts, putting out one-half in the drill be- 

 fore planting and the other half as a side dressing about July first, 

 according to season. The fertilizer mixture should contain about 10 

 per cent phosphoric acid and 2 per cent each of nitrogen and potash. 

 The nitrogen may be all derived from blood, tankage, cotton-seed 

 meal, or similar products, or in part from one or all of these, and in 

 part (up to one-half) from nitrate of soda. 



Kainit, manure salt, sulphate or muriate of potash may furnish 

 the potash, and acid phosphate the phosphoric acid. 



Four hundred pounds of the above mixture would contain 40 

 pounds of available phosphoric acid and 8 pounds each of nitrogen 

 and potash, and 1,000 pounds would contain 100 pounds of available 

 phosphoric acid and 20 pounds each of nitrogen and potash. The 

 required amounts of phosphoric acid in 400 and 1,000 pounds respec- 

 tively of this mixture would be supplied by 286 pounds and 715 

 pounds of 14 per cent acid phosphate; the nitrogen by 61.5 pounds 

 and 154 pounds of 13 per cent dried blood; and the potash by 40 

 pounds and 100 pounds of manure salt. Other materials or other 

 grades of these same materials may be used, and it will not be diffi- 

 cult, knowing just what they contain, to use such quantities of them 

 as will be necessary to furnish the quantities of plant food, having in 

 mind that it is the specific number of pounds of phosphoric acid, 

 nitrogen and potash that is desired, rather than a given weight of 

 mixed fertilizer. 



