430 ANNUAL REPORTS OF DEPARTMENT OF AGRICULTURE. 



cane appeared to be one of the most promising crops to be grown in 

 such a rotation. As a result, a series of fertilizer trials for both crops 

 has been begun to find the best practices to be adopted so as to secure 

 maximum results with each crop. A rather common belief among 

 certain classes is that Hawaiian-grown vegetables are deficient in 

 mineral salts, especially in lime and iron. A preliminary study 

 of the subject failed to substantiate this idea, but in order to obtain 

 definite data on it several common vegetables from the same lot of 

 seed are being grown in two places on the mainland and two in 

 Hawaii, and when ready for marketing they will be analyzed to 

 determine any differences that may be due to soils and climate. 



A study of the water used in irrigating various crops has been 

 begun. In many places the only available supplies carry a noticeable 

 amount of salt, and the effect of brackish water on various crops is 

 being investigated. It has already been found that well-established 

 alfalfa plants will tolerate a much greater amount of salt in irriga- 

 tion water than plants in the seedling stage. The effect of the 

 gradual accumulation of salt on soils and plant life in general is 

 also being studied. 



The extension work cairied on by the station has undergone some 

 readjustment due to the resignation of F. E. Krauss, superintendent 

 of extension, who had directed this work for seven years. The ex- 

 perimental and demonstration work at Haiku, Maui, was also termi- 

 nated, as the land on wdiicli the work was conducted belonged to the 

 superintendent, and his removal from the locality made it advisable 

 to cease operations on tlie former scale. Most of the projects under- 

 taken were brought to a satisfactory conclusion and reported upon. 

 A few of the projects are being continued in cooperation with the new 

 managers of the farm, but most of the work needing further con- 

 firmation has been transferred to the Haleakala substation, a tract 

 provided by the Territory, but managed by the station. This new 

 yubstation is about 7 miles from Haiku, and at a somewhat higher 

 elevation, but it represents a large tract of homestead land that had 

 been recently opened for settlement on. the island of Maui. Cool 

 nights and the lack of well-distributed rains make profitable agri- 

 cultural production rather difficult, and the question of first impor- 

 tance to be determined is the crops adapted to the region. About 30 

 different kinds of crops w^ere under trial during the past year, and 

 pigeon peas, purple vetch. Bellingham peas, and emmer gave the best 

 promise of regular dependable crops. The region in question is a 

 typical grazing one. In fact, it was so used before being made a 

 homestead tract, and it is possible that stock raising will continue 

 to be an important factor in its agricultural development. 



The extension agent for Hawaii has continued to give all his time 

 to that island, and he has established valuable contacts with settlers, 

 corporations, and others interested in developing various phases of 

 Hawaiian agriculture. A large ranch in Hawaii has set aside a tract 

 of 10 acres for demonstration work under the direction of the exten- 

 sion agent. The manager of the ranch furnished all implements, 

 work animals, and labor necessary to carry on the work. The home 

 demonstration work begun last year has been continued on a part- 

 time basis. Demonstrations in various phases of household economy 

 were made in cooperation with the Social Welfare Bureau, the aver- 



