lO 



Green Manuring. 



sufficient. It will be noticed that this amount of lupin- 

 infected soil is enormously in excess of the quantity used by 

 M. Schultz, and would render the operation far more tedious 

 and costly. It seems to indicate that in Dr. Larsen's experi- 

 ments the land was not so thoroughly infected with lupin- 

 bacteria as in the trials at Lupitz by long-continued lupin- 

 cultivation. The conclusions at which Dr. Larsen arrives 

 are that infection with lupin-bacteria does not help the growth 

 of other leguminous plants, but that on the other hand, lupin- 

 bacteria, or soil infected with lupin-bacteria, added consider- 

 ably to the yield of lupins, which appears to prove that each 

 leguminous plant requires its peculiar or symbiotic bacteria 

 to influence its growth. - 



Dr. Dehlinger carried on experiments near Darmstadt in 

 1 89 1 with green manuring upon soil of quite a different 

 character from that employed at Lupitz or in Dr. Larsen's 

 experiments in Norway, some of it being loamy, and some 

 loamy with a mixture of sand, having considerable natural 

 fertility. Upon taking this land in hand, Dr. Dehlinger got 

 rid of the live-stock, and instead of farmyard manure adopted 

 " green manuring " with most satisfactory results, obtaining 

 'good crops at a greatly diminished cost. 



There have been other experiments in Germany under the 

 superintendence of Dr. Salfeld, and in Sweden directed by Dr^ 

 Von P'eilitzen, of a more or less successful character, and 

 others are now in progress, which it is hoped will lead to more 

 definite knowledge upon a subject so important to agricul- 

 turists. 



