1906.] Inoculation of Leguminous Plants. 649 



beans, and peas : the soils were (b) soil taken from a field in 

 which the same germs and species of plant had been grown in 

 1904 ; (c) soil from a plot on which potatoes, and potatoes only, 

 had been grown for twenty to thirty years. 



Alsike and red clover were equally luxuriant on both soils, 

 with and without inoculation. Lucerne gave a much better crop 

 with inoculation than without in soil (b), but both pots failed on 

 soil (c) — the potato soil. Peas, however, grew equally well on 

 this soil (V), with and without inoculation ; but in the soil (b) 

 inoculation gave positive results. Beans benefited slightly from 

 inoculation in both soils. 



Bangor. — Moore's cultures for peas and clover : there was 

 some little difference for a time in favour of plants grown from 

 inoculated seed in soil taken from a mountain side. Experiments 

 in fertile soil showed no difference. 



Cambridge. — Moore's cultures gave negative results in pots of 

 garden soil, poor clay subsoil, and soil from an old wood in 

 which no leguminosse can have grown for many years. 

 Nodules formed abundantly, both when untreated and when 

 inoculated. All the tests were made in duplicate. 



Chelmsford. — Moore's cultures for beans, peas, and clover gave 

 no result from inoculation of plants growing in pots containing 

 a garden soil, a field soil, and a soil from Galleywood Common. 



Edinburgh. — Moore's cultures gave negative results in pots of 

 garden soil on which no leguminous crop had been grown for 

 probably forty years. 



Kingston. — Moore's and Hiltner's cultures for'peas and beans : 

 pot cultures in a black soil from a wood which had not been 

 cultivated for many years, and in a fertile garden soil. Series 

 the same as in sterilised pots. 



The results were as follows : — The uncultivated soil gave 

 negative results with beans, but a decided increase with peas, 

 both with Moore's and Hiltner's cultures, the yield of air-dried 

 plants in one case (seed dressed with Moore's culture), being 

 greater than the yield from the completely manured pot. In 

 fertile garden soil the yield from pots of beans was greatly 

 increased by the inoculation. 



