TuK Hri.I.KTIN l;> 



hybrid Xo. (I.'i. The fertilizers used were made under the direction of 

 the writer bv the courtesy of the Porter Fertilizer Company. None of 

 the exi)erimeiitcrs were advised as to the kind of fertilizer with which 

 they were supplied; neither have they since been advised as to the results 

 obtained by any of the experimenters. 



"Level ground was selected I'm- each experiment, exactly the same 

 sized patch was cultivated in eveiy experiment, and exactly the same 

 amount of fertilizer was used on every patch. Elaborate precautions 

 were taken to secure accuracy. The writer weighed out each bag of 

 fertilizer, which was numbered, and numbered stakes were placed in 

 each bag to be driven in the rows. At harvest time numbered sacks 

 were sent to each experimenter as receptacles for the seed cotton. All 

 of the seed cotton was carefully air-dried before weighing. Half of the 

 nitrogen in all the fertilizers used Avas derived from nitrate. Exactly 

 the same amount ef phosphoric acid and nitrogen was used on every 

 patch. On patches No. 1 and No. 2 abundant amounts of potash were 

 used at the rates of 200 pounds of 121/4 per cent kainit per acre, which is 

 40 pounds more of kainit than when 1,000 pounds of 10-2-2 guano is used 

 per acre. On pfltch No. 3 no potash was used, but this guano was mixed 

 with finely ground limestone so that the limestone used would be applied 

 at the rate of 1,600 pounds per acre. 



"These bags of acid phosphate mixed with meal and nitrate of soda 

 and large quantities of finely ground limestone were allowed to stand 

 several weeks before the fertilizer was used on patch No. 3. 



"The average of these results shows that the six men in six counties 

 on six different soils harvested 16 PER CENT MORE SEED COT- 

 TON ON PATCH No. 3, WHERE NO POTASH WAS USED, 

 BUT WHERE LIBERAL APPLICATIONS OF FINELY GROUND 

 LIMESTONE WERE MADE, THAN ON PATCHES No. 1 AND 

 No. 2, WHERE POTASH WAS USED. 



"Summarizing these experiments, the writer advocates that on Geor- 

 gia soils liberal amounts of guano containing 10 per cent phosphoric 

 acid, 2 per cent ammonia, together with not less than 1,600 pounds of 

 very finely divided limestone, will bring excellent results in the cultiva- 

 tion of cotton. 



"The value of builder's lime as a soil amendment is recognized, but 

 emphasis must be placed upon tlie fact that BUILDER'S LIME IS 

 INJURIOUS TO FERTILIZERS, whereas limestone can be mi.xed 

 with fertilizer in any quantity without in any way rendering the fer- 

 tilizer less valuable, as was shown by these experiments." 



Some laboratory experiments by Brackett and Freeman of South 

 Carolina have been cited in opposition to the conclusions drawn from 

 the above data ; but Mr. Brackett himself admits his were mere labora- 

 tory experiments and were not carried out under field conditions. They 

 can, therefore, have little or no bearing on the very important question 

 under discussion, namely, WHETHER IT WOULD BE WISE TO 



