348 THE FORAGE AND FIBER CROPS IN AMERICA 



442. Kinds and Quantities of Commercial Fertilizers. 

 The Texas Station recommends 100 to 150 pounds of cotton-seed 

 meal and 100 to 200 pounds of 14 per cent, acid phosphate. This 

 station believes soils in Texas do not require potash. 1 The 

 Georgia Station, as the result of fourteen years' experiments, 

 recommends for cotton, on old worn uplands, a fertilizer con- 

 taining nitrogen, available phosphoric acid and potash in the 

 ration of 3: 10: 3. This ratio, but not these percentages, may be 

 obtained by mixing 1,000 pounds of 14 per cent, acid phosphate; 

 700 pounds of cotton-seed meal containing 7 per cent, nitrogen, 

 2.5 per cent, phosphoric acid and 1.5 per cent, of potash, and 75 

 pounds of muriate potash. 3 From 350 to 700 pounds of this 

 mixture are recommended to be bedded on two weeks before 

 planting with 20 to 30 pounds of nitrate of soda applied in 

 the furrow when seeds are planted. 



When a well-ordered rotation is practised, each crop being 

 liberally and judiciously fertilized, each succeeding cotton crop 

 will require a somewhat less relative quantity of nitrogenous 

 fertilizers. On well improved soils, on comparatively new 

 soils, or on bottom lands the cotton seed may be reduced from 

 one-third to one-half. 3 



For sandy soils the Alabama Station recommends the same 

 mixture in amounts varying from 280 to 420 pounds per acre; 

 for clay soils it is advised to omit the potash and apply from 

 240 to 320 pounds per acre of the cotton-seed meal and acid 

 phosphate mixture, while for any well drained soils on which 

 cotton is known to be liable to black rust it is advised to reduce 

 the phosphate and increase the potash by applying the follow- 

 ing mixture: cotton-seed meal, 120 to 160 pounds; acid phos- 

 phate, 80 to 120 pounds; and kainit, 80 to 120 pounds per acre. 

 The lime soils of the central prairie region of Alabama usually 



1 Texas Sta. Bui. No. 75 (1904), p. 18. 



3 About 2.5 pounds of crushed cotton seed are equivalent as a fertilizer to one 

 pound of cotton-seed meal. 



a Georgia Sta. Bui. No. 70 (1905), p. 88. 



