FIELD CROPS. 833 



In 19or> tlio f(>rtiliz(M- oxiiorinicnfs wcm'c conduclod ;il Cairo, Ga., on 2 fields, 

 A and B. Field A, a K'huI Ki'mle ol" ijinc land, had liccn in cnltivation for at least 

 UO years, and Held B, of the same ^rade of land, only abdut (! years. The jilats 

 receiving no fertilizers prodneed an average of ll.oT and 14.r)2 tons of eane 

 per acre on lields A and B, respectively. The highest average yields, 2.3.44 tons 

 on field A and 2r).S4 tons on field P., were secured on the plats receiving eith(>r 

 1,200 or 2,000 Ihs. of the normal formula in two applications. 



Canes grown helow the frost line in Florida were analyzed and found to he 

 very rich. Samples received IMarcli 111 contained 20.00 per cent of sucros(\ and 

 samples received from (he same locality Novemhei- 11. l.">..">0 ]ier cent, the 

 imrity for the 2 lots heing 01.. "Id ])er c(Mit iind 70 per cent, respectively. 



(Grinding cane was hegun at tlie experimental sirup factory at Waycross, Ga., 

 Xovomher 3 and completed Deccmher 7. In 25 days of grinding 12,240 gal. of 

 sirup was produced from 500 tons of cane. The average quantity of sirup per 

 ton of cane was 21.87 gal. The average percentage of total solids i:\ the juice 

 was 15.07 per cent; of sucrose, 11.10 per cent; of reducing sugar, 2.15* per ceut, 

 and the average purity coefficient 73.G3 per cent. 



Analyses of the finished sirups showed an aver-ag(> of 75.7."! per cent of total 

 solids, 46.05 per cent of sucrose, 24.40 per cent of reducing sugar, 21.00 per cent 

 of inversion, and 03.11 per cent of total sugar in total solids. 



The results secured in the 4 years' experiment in the fertilization of sugar 

 cane, 1002-1005, are summarized at length in tabular form and discussed. 

 Dividing the fertilizer and making 2 or 3 applications as compared, with apply- 

 ing it all at one time did not show a sufficient advantage to .iustify the practice. 

 The results obtained by applying half of an application of 2,000 lbs. of the 

 normal formula at planting and the other half at a subse(iuent period of growth 

 gave a very large increase in yield as compared with making the application 

 all at one time. In some cases the data apparently indicated a loss in the 

 efficiency of the fertilizer when applied at three successive intervals instead of 

 at two. 



In experimenting with the revised formula it was found inadvisable to use in 

 connection with it an application of 200 lbs. of nitrate of soda per acre, eitiier 

 in one application with 1*200 lbs. of the revised formula or at intervals. The 

 comi)inations of plant food represented by either the normal forujula or the 

 revised formula gave good results and no great advantage was shown in depart- 

 ing widely from these formulas. The quantities of plant food contained in the 

 normal fornnila are considered necessary for the production of profitable crops 

 of sugar cane on this type of soil, and the average results of the experiment 

 are regarded as indicating that the crop of sugar cane may be about doubled 

 by the application of these amounts of plant food per acre. 



Annual report of the bureau of sugar experiment stations for the year 

 1905—6, W. ;Maxweix (Ann. Npt. QucciiKlaiid liin: Siij/ar E.rpt. Stas.. (1 

 (1!)()5-G), in). .56'). — Analyses of sugar canes grown by farmers and of water for 

 irrigation purposes, together with results of variety tests of cane from different 

 countries, and of culture, irrigation, and fertilizer experiments, are tabulated. 



The following varieties ranking in the first class for commercial sugar 

 production are retained in the experiment and carried to the third rattoon crop : 

 .Vew Guinea, 4, 8A, 15, 22, 24, 24A, 24B, 2G, 38, 40, <34, and G6 ; Mave, Trinidad 

 00, Yuban, N. G. 37, 47, 48, 54, and 55. Mauritius Settlers and Bois Rouge 

 were also continued either for distribution or for other purposes. 



Irrig:ition supplying a maxinnnn or some excess of moisture tendcnl to lower 

 the purity of the juice, and manures cm irrigated and nonirrigated plats, while 

 increasing the production of the cane, produced a similar result. It is stated 



