29 



B >li<>\\s a higher content of sucrose in the juices. Comparing these 

 d;ii;i with those for the use of 800 pounds of fertilizer in one applica- 

 tion it is seen that in field A there is an increased yield of 3 tons per 

 acre and in Mold B of 2.17 tons per acre; and for 1902 and 1905, being 

 the same Molds, there is an increased yield in field A of 2.10 tons per 

 aero and in field B of 0.94 ton per acre. Combining the increased 

 yields into one expression \vo find an average increased yield of 2.05 

 ton- per acre, as a compensation for the excess of 400 pounds of fer- 

 tilizer used. Assuming that the cane is worth $3 per ton, we find the 

 increased yield in money is $6.15. Assuming that the fertilizer is 

 worth $12 per ton, the increased cost of the fertilizer is $2.40, leaving 

 a balance of profit of $3.75 per acre in favor of using the additional 400 

 pounds. 



In the use of 1,200 pounds of the normal-formula fertilizer in two 

 applications, one previous to planting and one later, it is seen that the 

 average yield for field A is 19.53 tons and for field B 19.15 tons per acre. 



The cane from field B shows a slightly greater quantity of sucrose 

 in the juices and a slightly decreased amount of reducing sugar. For 

 the years 1902 and 1905, with the same pieces of land, the average 

 yield for field A is 19.57 tons and for field B 22.35 tons per acre, the 

 quality of the cane in field B being somewhat better than in field A. 

 In comparing the yields produced by 1,200 pounds of the normal- 

 formula fertilizer in two applications with those produced by a single 

 application the following results are obtained: In field A there is a 

 loss of 1.54 tons per acre as a result of two applications; in field B 

 there is a loss of 0.58 ton per acre. Comparing fields A and B for 1902 

 and 1905 there is a gain in favor of two applications of 1.03 tons per 

 acre in field A and of 1.01 tons per acre in field B. The results, there- 

 fore, are not decisive, showing a loss upon the whole for the four years 

 by the two applications, but a gain in the years 1902 and 1905 as com- 

 pared with the result of one application. 



Attention will next be given to the results of using 1,200 pounds of 

 the normal-formula fertilizer in three applications, one at the time of 

 planting and two at successive periods of growth. The average yield 

 for the four years in field A for three applications is 18.60 tons and for 

 field B 20.08 tons per acre, field A showing a slightly better quality of 

 juice. Comparing these figures with the results for two applications 

 of the same fertilizer, it is seen that there is a loss of 0.93 ton per acre 

 in Meld A and a gain of 0.93 ton per acre in field B. These data indi- 

 cate that no advantage results from the splitting up of the fertilizer 

 into three portions to be applied at different times. In the years 1902 

 and 1905 the average yield on field A from three applications is 19.70 

 tons per acre and on field B 24.23 tons per acre. Compared with 

 similar data for two applications there is a gain of 0.13 ton per acre on 



