ILLUSTRATIONS. 



Page. 

 Fig. 1. ViewinaCaliforniaorangegrove, showing the method employed in plow- 

 ing under a green-manure crop 13 



2. Experimental plats of horse beans at Chico, Cal., showing the striking 



superiority of the noduled plants 14 



3. View in an orange orchard in southern California, showing common 



vetch grown as a green-manure crop 16 



4. View in an orange orchard in southern California, showing Canada field 



peas grown as a green-manure crop ,. - - 18 



5. An individual plant of fenugreek, showing its characteristics 20 



6. View in a walnut orchard in Orange County, California, showing fenu- 



greek grown as a green-manure crop 21 



7. A field of black-purple vetch at Chico, Cal 28 



8. A field of black bitter vetch at Chico, Cal 29 



9. View in a citrus orchard in southern California, showing horse beans 



grown as a green-manure crop 31 



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