146 



THE EOTHAMSTED EXPERIMENTS. 



was no gain of nitrogen ; whilst with microbe-seeding, and 

 with numerous nodules, there was considerable gain of nitro- 

 gen ; there being, with much less nitrogen in the seed, and 

 about the same amount in the products, as in the correspond- 



-*a» 



21 mt'ici li h" 



3*b y 



SAND Sc ASH. 

 STERILIZED. 



SAND Xr ASH, 

 MICROBE-SEEDED. 



G \KPEN 



son. 



Pot 1. 



Pot 2. Pot 3. 



Fig. 3.— PEAS. 



Pot 4. 



\ 



ing experiments with peas, very many times as much nitrogen 

 in the vegetable matter produced as in the seed sown. See 

 fig. 4. 



The experiments with yelloiv lupins gave very striking 



