650 Inoculation of Leguminous Plants. [feb., 



The weights in grams of air-dried plants were as follows :- 



Beans grown in garden soil manured without nitrogen, no inoculation — 

 Seed - - ' - 2576 grams I = ^ 



Stems and pods ... ... 21*37 



Beans with nitrogren as ammonium nitrate — 



Seed ... ... 28*15 grams) = 



Stems and pods 16*05 „ J 



Beans in soil inoculated with I c.c. of Hiltner's culture — 



Seed 31 ' 2 5 grams 



Stems and pods ... ... 21*35 



Beans in soil, seed inoculated with Moore's culture — 



Seed ... ... ... ... 31*455 grams 



Stems and pods ... ... 20*57 



} = 52*60 



'} = 52*025 „ 



Newcastle. — Moore's cultures for Alsike, and Hiltner's for 

 vetches : ordinary cultivated soil and moorland soil. Soil in- 

 oculated and seed inoculated in each set. Culture made no 

 difference in crop with either Alsike or vetches on cultivated 

 soil. On moorland soil, slight advantage in favour of inoculated 

 soil with Alsike, but none whatever with vetches. There was 

 no clear proof, in the case of the Alsike, that the advantage was 

 due to the culture. 



Woburn. — Hiltner's cultures, for peas, beans, tares, and red 

 clover, and Moore's cultures for Melilotus and soy bean. 



Soils : (b) a poor soil that had not borne leguminous crops for 

 at least twenty years ; (c) a good fertile soil. The soils were 

 not sterilised, but otherwise the treatment and times of sow- 

 ing were the same as in the case of the sterilised soil (see 

 above). The result is shown by the following figures, which are 

 the means of duplicate pots : — 





Weight 



Weight 



Percentage of 



Crop. 



of grain 



of straw 



untreated 





in grams. 



in grams. 



Grain. 



^traw. 



— Peas (German culture) — 











(b) Poor Soil— Not treated 



17*48 



24-79 



100 



IOO 



Treated 



1771 



29*37 



IOI 



118 



(c) Good Soil — Not treated 



25-98 



35-21 



100 



IOO 



Treated 



25-03 



24*66 



96 



70 



II. — Beans (German culture) — 











(b) Poor Soil— Not treated 



35'03 



48-03 



100 



IOO 



Treated 



40 '22 



5374 



114 



112 



{c) Good Soil — Not treated 



45'48 



74-88 



100 



IOO 



Treated 



47*40 



71*09 



104 



94 



III. — Tares (German culture) — 











(b) Poor Soil — Not treated 



29'37 



33*57 



IOO 



IOO 



Treated 



28*82 



35-30 , 



98 



104 



(c) Good Soil— Not treated 



39-17 



5272 



IOO 



IOO 



Treated 



32-97 



56*02 



84 



106 



