APPENDIX 



I. FERTILIZER EQUIVALENTS 



The nitrogen in is about the same as in 



i pound nitrate of soda = T.\ pounds cotton-seed meal, 

 i pound cotton-seed meal = 2\ pounds cotton seed, 

 i pound sulfate of ammonia = i| pounds nitrate of soda. 

 i pound sulfate of ammonia = 3 pounds cotton-seed meal. 

 i pound (h.g.) dried blood = if pounds cotton-seed meal. 



The potash in is about the same as in 



i pound muriate of potash = 4 pounds kainit. 

 i pound sulfate of potash = 4 pounds kainit. 



Substitutions may be made in the following formulas, or in any 

 others, on the basis of the figures above. 



II. SOME FERTILIZER FORMULAS 



As pointed out in the text, the only positive means of finding the 

 best fertilizer for a certain crop on a given soil is by making a field 

 test of fertilizers. Until such a test is made, the following formulas may 

 be used as suggestive and general, rather than as suiting every soil. 

 Many other formulas having the same composition can be calculated 

 as directed in Section XVIII. Acid phosphate is assumed below to 

 contain 14 per cent of available phosphoric acid. 



1. For cotton on poor clay and land, where cotton-rust does not 



occur : 



Acid phosphate, 150 to 300 pounds per acre. 

 Cotton-seed meal, 1 50 to 300 pounds per acre. 



2. For cotton on fair or good clay land, where cotton-rust does not 



occur : 



Acid phosphate, 200 to 300 pounds per acre. 

 Cotton-seed meal, 100 to 150 pounds per acre. 



