66 



The Weekly Florists' Review. 



JUNE 15, 1899. 



NITRAGEN AND ITS USES. 



Nitragin consists of bacteria ob- 

 tained in tbe first place from the 

 nodules of leguminous plants, and sub- 

 sequently increased in numbers by a 

 process of cultivation prescribed by 

 two eminent scientists, Professors 

 Nobbe and Hiltner. The bacteria re- 

 ferred to are present in all fertile 

 soils, and attach themselves to the 

 roots of the growing plant, and thus 

 lead to the formation of the nodules. 

 When thus associated with the roots 

 of leguminous plants they assimilate 

 free nitrogen from the ground air, and 

 form nitrogenous compounds, which 

 are used by their hosts for the pur- 

 poses of growth. This accounts for 

 the fact that leguminous crops are 

 usually regarded as independent of ar- 

 tificial supplies of nitrogenous man- 

 ures; and some idea of the amount of 

 useful work carried on by these bac- 

 teria may be formed from the con- 

 sideration that, although a large quan- 

 tity of nitrogen (ninety-eight pounds 

 in an average crop of beans) is re- 

 moved with the crop, there yet re- 

 mains in stubble and root a large sup- 

 ply of nitrogenous compounds, and 

 the soil is left richer in nitrogen than 

 it was before the growth of the crop. 

 It is quite possible that some soils are 

 more or less deficient in these bac- 

 teria, and may therefore be made to 

 bear heavier leguminous crops by ap- 

 plications of nitragin. It should also 

 be remembered that a heavier legu- 

 minous crop implies a greater yield 

 also from the succeeding crop, and 

 therefore the action of this fertilizer 

 is a matter of some interest to the 

 cultivator. In the experiments car- 

 ried out by Professors Nobbe and 

 Hiltner the best results were obtained 

 by supplying the various leguminous 

 plants with bacteria derived from 

 the nodules of their own particular 

 species. Twenty-two kinds of nitra- 

 gin are to be obtained, one for each 

 of the kinds of leguminosae usually 

 cultivated, and there are two ways 

 of applying it, viz., to the seed and to 

 the soil.— Gardeners' Magazine. 



CLEMATIS DISEASE. 



An English writer holds that the 

 so-called clematis disease is due to 

 the stock upon which the plants are 

 budded. He says that while plants 

 grow faster when worked on the C. 

 vitalba stock they are not permanent, 

 and that to be enduring they should 

 be worked in the old way on the roots 

 of C. flammula. 



JAMES KELWAY, the well known 

 English florist, died May 17, aged 83 

 years. He produced many valuable 

 new varieties of florists' flowers dur- 

 ing his long life, the gladiolus in par- 

 ticular having been greatly improved 

 by him. He was also one of the first 

 to improve the cineraria, and the 

 paeony, the pyrethrum and the delph- 

 inium also owe much to his skill as a 

 hybridist. 



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EXCURSIONS VIA THE WABASH. 



Detroit, Mich., July 3 to 6, account Chris- 

 tian Endeavor Convention. Rate from Chi- 

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A glance at this map will show that the 

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 Adams St., Chicago. 



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