144 



EXPERIMENTAL FARMS. 



TABLE II. 



THE PERCENTAGE COMPOSITION OF THE "DRY MATTER" OF THE (a) STEMS AND LEAVES, 



AND {h) ROOTS OP THE PLANTS. 



Nitrogen 



Ash or mineral matter. 

 Organic matter 



From Pots Ox.G. 

 Not inoculated. 



Stems and 

 Leaves. 



3-212 

 1.^-46 

 86-54 



Roots. 



2-321 

 41-91 

 58-09 



From Pods H.H. 

 Soil inoculated. 



Stems and 

 Leaves. 



3-223 

 11-52 

 88-48 



Roots. 



2-324 

 36-76 

 63-24 



From Pots LI. 

 Seed inoculated. 



Stems and 

 Leaves. 



2-936 

 12-33 



87 -67 



Roots. 



2-478 

 40-49 

 59-51 



The data do not allow of the deduction that the plants from inoculated soil or seed 

 are relatively richer in nitrogen than those -without Nitragin. The larger amount of 

 nitrogen in the treated crop is rather due to a greater development of root or foliage, or 

 both, under the stimulating effect of the micro-organisms furnished by the preparation. 



The percentages of ash or mineral matter are not to be compared too closely, as by 

 the method employed it was found extremely difficult to separate the last traces of sand 

 upon the roots. The presence of a small amount of sand would materially increase the 

 percentage of " ash." 



MAMMOTH RED CLOVER. 



Culture used, " Trifolium pratense." The plants were thinned to 10 plants in each 

 pot. The experiment was closed on October 22nd, when a few of the plants were in 

 flower. Previous to the weighing of the plants a photograph of the series was taken, 

 a reproduction of which is here given. 



Pots D.D., Not inoculated, weight of plants, including roots. . 

 Pots E.E., Soil inoculated, do 



Pots F.F., Seed inoculated, do 



Grams. 



147-6 

 163-2 

 189-0 



These data show that considerable increase in weight of crop has resulted from the 

 action of the Nitragin, though it is to be remarked that, unlike the results with the horse 

 beans, the greater yield is obtained from the experiment in which the seed was inoculated. 



The nodules or tubercles were much smaller than those on the roots of the horse 

 beans. From mere inspection of the roots it was extremely difficult to decide which 

 series was the richest in nodules. The root systems, as regards development, were ap- 

 proximately in the ratio represented by the total weight of the crops. 



