21 



the same amount, vix. Xos. :>. Id. -J-J. and _':',. and the other- a ^mailer 

 quantity, 



It is seen that the general ell'ect of the added fertili/ers on the coin- 

 position of the juices is unimportant. If we compare, on the other hand, 

 the character of the canes in Field B with plat '1 \ of Field A. we see 

 at once a marked inferiority in the juices. This is shown both in t lie- 

 lower content of sucrose, a higher content of reducing sugar, and a 

 lower purity. Not one of the plats in Field \\ produced a juice having 

 as high sugar content, as small a quantity of reducing Migar. <>r a- high 

 purity as the juice of the cane on plat -_M of Field A. 



Inasmuch as the same quantities of fertilixers were added to Field A 

 and Field \\. the conclusion is evident that t he inferior character of the 

 cane grown on Field P> was due to the comparative newness of the soil 

 ftnd to the influence of the heavy crop of velvet beans plowed under 

 during the previous season. It is not to be inferred from the above 

 that the chemical duiracterof the canes grown on Field P> was low; on 

 the contrary, they art 1 of quite an excellent composition, both in con- 

 tent of sugar and in purity of juice. The inferiority, therefore, is in 

 their comparison with th( 4 canes grown on Field A. The logical con- 

 clusion to be drawn from this discussion is that the large excess of 

 available nitrogen and organic nitrogenous matter in the soil, while 

 tending to produce a large crop, also has a decided tendency to diminish 

 the excellence and purity of the product. It would be quite logical to 

 infer from the above data that the canes grown on Field A would 

 make a better quality of sirup, having a brighter color, and bringing 

 a larger pi-ice in the market than that yielded by the same weight of 

 canes grown on Field B. 



SUMMARY OF RESULTS. 



(1) Velvet beans have a high value as a fertilizing agent, but this 

 value reaches its maximum only when other essential elements of plant 

 food other than nitrogen are applied in the fertilixer. 



(2) In the application of fertilizing materials it is far better not to 

 apply the whole amount at the time of or before planting, but to apply 

 a part of the fertilizer at the time of planting and the rest at intervals 

 during the growing season. 



(3) In regard to the amount of the fertilizer to be applied to obtain 

 the best financial results, it appears that l,2oo pounds of the normal 

 fertilizing material is probably the best amount for Field A. while for 

 Field B a larger amount of this fertilizer may be used. It is plain, 

 however, in this case, that the increased amount of fertilixer could be 

 more profitably secured by adding larger quantities of phosphoric acid 

 and potash and a smaller quantity of the nitrogenous constituents. On 

 Field A there was a profit in using 1,200 or even :i.nno pound* of the 

 fertilizer per acre rather than 800 pounds, but on Field 1. there was no 



