yiELD CROPS. 835 



Seedling- canes and manurial experiments, J. P. d'^^buquerque et al. 

 (Local Dcpt. Agr. Barbados, SrcfJIiiuj Canes and Manurial E.ipt.s., 1011-1913, 

 pp. 77). — In this reiwrt methods of hyhridizinj; sugar-cane plants and of obtain- 

 ing self-fertilized seeds are descril)e<l. Tables give results of variety tests 

 of new seedlings and rattoons, with a sununary of results since 1009. In 

 manurial experiments, the results obtained by the use of b.irnyard manure, 

 sulphate of ammonia, nitrate of soda, dricnl blood, superphosphate, basic slag, 

 sulphate of ix)tash, nitrate of lime, and uitrolinie as fertilizers for sugar cane 

 are given in tabular form for 1911-1913, as well as the average results ob- 

 tained on the manurial experiment plats at Dodds for 20 years, 1894-1913. 

 In these experiments nitrogen was applied at the rate of GO lbs., potash 60 lbs., 

 and phosphate 80 lbs. per acre each year. 



The results showed that '* whore GO lbs. of nitrogen as sulphate of ammonia 

 was applied, 15 lbs. in January and 45 lbs. in June, there has been only a small 

 gain over the 'no-manure' plat of $2.74 and a loss compared with the 'no- 

 nitrogen' plat of 70 cts. per acre per annum. Where SO lbs. of nitrogen as 

 sulphate of ammonia was applied, there has been a gain of only $3.10 over the 

 'no-mauure' plat and a loss when compared with the 'no-nitrogen' plat of 34 cts. 

 per acre per annum for that period. 



"With regard to the phosphate series, it is sufficient to say that in all the 

 [ilats to which phosphates have been applied during the 20 years there has 

 been a loss as compared with the ' no-phosphate * plats, with the exception of 

 the plat to which 100 lbs. of basic slag has been applied per acre. In this case 

 there was a gain of $18.84 over the 'no-manure' plat and $1.96 over the 'no- 

 phosphate' plat. In the case of the 'no-phosphate' plat the gain over the 

 * no-manure' plat was $16.88. With regard to the plats to which superphos- 

 phates were applied, the loss on the average per acre per annum for the 20 

 years varied from $14.13 to $6.18. In the case where 80 lbs. of basic slag was 

 applied, the loss on the average for the 20 years was $1.78 when compared 

 with the ' no-phosphate ' plat. 



" In the potash series of all the plats, with the exception of the one to which 

 60 lbs. of pota.sh as sulphate of potash was applied all in January there was an 

 increase varying in the case of the 'no-manure' plat from $2.75 to $9.94 and 

 in the case of the 'no-potash' plat from 56 cts. to $5.13 per annum. In the 

 case of the plat to which potash at the rate of 60 lb.s. per acre was applied 

 there was a gain of only $2.75 over the 'no-manure' plat and a loss of $2.06 

 when compared with the ' no-potash ' plat." 



Studies on the tobacco crop of Connecticut, E. H. Jenkins (Connecticut 

 State Sta. Bui. ISO (1914), PP- S-65, pi 1, figs. J4).— "This bulletin is in no 

 way a guide to tobacco growing or a treatise on the whole subject but simi>ly 

 brings together in small compass the general results of such work as this 

 station has done in the interest of tobacco growers and handlers," and covers 

 a period of perhaps 20 years. It was necessitated because of the exhaustion 

 of the station's previous bulletins and reports on the subject. 



The topics handled in this bulletin include quantity of nitrogen and mineral 

 elements in the tobacco crop (leaves, stalks, total) ; relation between com- 

 position of ash and the burning quality; proximate composition of the leaf 

 before and after fermentation; grain of tobacco; area of leaf surface on an 

 acre of tobacco; seed production of tobacco; fertilizer experiments, that in- 

 clude loss of weight in fiM-mentation. weight of leaves, fire-holding capacity, 

 percentage of wrappers, yield, loss in sorting, comparative value of leaf from 

 several plats, and the comparisons of nitrate of soda, cotton-seed meal, castor 

 pomace, linseed menl, fish scrap, stable manure, tobacco stems, various forms 



