Bui. 46. Hawaii Agr. Expt. Station. 
Plate V. 
Fig. I.— Single Disk Plow with Subsoil Attachment. Adapted to Plowing 
Under Pigeon Peas for Green Manure. 
Fig. 2.— Field of Pineapples Following Pigeon Peas. Third Crop Plowed 
Under. Pineapple Yield 20 Tons A No. I Fruit per Acre. 
