GREEN MANURING. i; 



Figure 5 refers to another of Prof. Wagner's important 

 experiments bearing on green manuring. All eight pots 

 received potash and phosphoric acid alike. The first two 

 pots received no nitrogen, second two were green manured 

 with lupines, the third two with buck\vheat and the fourth 

 two with peas. The results show the usefulness of green 

 manuring with legumes and the failure with non-legumes 



FIG. 5. DIFFERENT RESULTS FROM LEGUME AND NON-LEGUME 

 GREEN MANURE. 



that is, plants that do not have the power of drawing nitro 

 gen from the atmosphere. 



As has been shown by the illustrations, crops like 

 buckwheat and mustard are not adapted for green manur- 

 ing, but farmers sometimes raise these crops in the fall, 

 manuring them with nitrogen fertilizers, so as to get a 

 good growth, arid plow them under in the spring. Many 

 experiments and practical experience show that this method 



