28 



as a whole, from dividing the fertilizer into two portions and apply in 

 one at the time of planting and one during the period of growth, 

 however, the comparison is made upon fields A and B for 1902 an 

 1905, respectively, being identical pieces of land, it appears that a grea 

 benefit was secured by dividing the fertilizer, amounting on field A 

 3.29 tons per acre and on field B to 2.24 tons per acre. When 800 poun 

 of normal-formula fertilizer were used in three applications, one befo 

 plant big and the other two at successive periods of growth, the yiel 

 per acre on field A was 15.62 tons and on field B 16.50 tons. N 

 application of this kind was made in the first year of the experimen 

 and therefore no comparison can be made with the whole series. Appa: 

 ently the yields per acre namely, 15.62 tons and 16.50 tons, res 

 tively are not so great as in the case of a single application, especial! 

 in the case of field A. It is noticed, however, that the experiment w 

 made only with one plat in each c: se, j:nd therefore is not conclusi 

 as the variations between plats in the same year was sometimes grea 

 than the variations in the whole field from year to year. 



The effect of increasing the quantity of fertilizer applied is next c 

 sidered. The first comparison is in the case of the use of 1,200 poun 

 of the normal fertilizer broadcasted. It should be understood in thij 

 sense that wherever the terms "one application," "two applications,' 

 etc., are used it means the use of the fertilizer in or near the row in con 

 trast with the term "broadcast." For three years there is is a com 

 parison of the plats on which 1,200 pounds of normal formula \\a: 

 thrown broadcast in which the average yield per acre is 16.97 ton! 

 and 18.48 tons, respectively. In this case the cane in field B is conji 

 siderably richer in sucrose, while there is but little difference in tl| 

 content of reducing sugar. 



Comparing the plats for 1902 and 1905, the yields are 18.59 t 

 and 21.63 tons, respectively; and again the cane grown on field Ij 

 contains a larger quantity of sucrose, but a very much smaller quauj 

 tity of reducing sugar. In fact, its composition would have nmdl 

 it exceptionally valuable for the manufacture of sugar. 



These average data can not be compared with the results from som 

 ing 800 pounds of the same fertilizer broadcast, because that was doni 

 in only one year. We may, however, compare the data for that yeaJ 

 In field A when 800 pounds were used the yield was 7.20 tons per aca 

 in 1903, while it. was 12.10 tons per acre where 1,200 pounds we| 

 used an increase of 4.90 tons. In field B the yield with 800 pound* 

 of fertilizer was 7.95 tons per acre, while it was 9.05 tons with 1/20C 

 pounds an increase of 1.10 tons per acre. 



Where 1,200 pounds of the normal fertilizer was used in one appli 

 cation before planting the average yield for field A for the four yean 

 is 21.07 tons per acre and for field B 19.73 tons per acre. Again field 



Oil! 



