HAWAII. 125 



source of nitrogen for rice in Hawaii than sodium nitrate. In addi- 

 tion to the crops mentioned above, some attention is given to corn 

 breeding and the value of leguminous plants when grown for cover 

 crops and for forage. 



The station chemist has continued his pineapple investigations, 

 giving particular attention to the effect of manganese on the plant, 

 the process of ripening of the fruit, and the utilization of the b}^- 

 products from the canneries. It appears probable that where man- 

 ganese in considerable quantity is present in the soil the cultivation 

 of pineapples should be discontinued, but investigations are still in 

 progress to ascertain whether the application of fertilizers might 

 not overcome the injurious effect of the manganese. In connection 

 with these investigations it has been found that one of the most 

 serious drawbacks to pineapple cultivation is a lack of aeration in 

 the soil, and this subject is being given especial attention. 



The horticulturist has perfected methods for the propagation of 

 the mango and avocado, and is continuing his efforts in building up 

 collections of desirable varieties of tropical fruits. 



The entomologist has given especial attention during the past j^ear 

 to insects attacking sweet potatoes, and attempts are being made to 

 introduce parasites of the weevil that has proved so destructive to 

 the algaroba bean. 



The station is carrying on cooperative experiments with a number 

 of crops in different parts of the island, and has begun the establish- 

 ment of demonstration farms, the funds for which are supplied by the 

 Territory. 



The publications of the Hawaii station during the past year w^ere 

 the Annual Report for 1009; Bulletins 19, Experiments in Tapping 

 Ceara Rubber Trees; 20, Shield Budding the Mango; 21, A Study of 

 the Composition of the Rice Plant; Press Bulletins 25, Carbon Bi- 

 sulphid for Killing AVeeds; 2G, The Algaroba in Hawaii; and 27, 

 The Use of Insecticides in Haw^aii. 



The revenues of the station for the fiscal year ended June 30, 1910, 



were as follows: 



Uuitetl States appropriation $28. 000. 00 



Sales and other funds 380. 29 



Territorial appropriation 7, 500. 00 



Individuals ^ 393.50 



Total 36, 282. 79 



The work of the Hawaii station for the diversification of agriculture 

 is making steady progress. The aid that it has given in studving 

 various problems has resulted in the establishment of cotton planting 

 as a commercial enterprise, as well as an extension of a number of 

 minor industries. The appreciation of the work is readily seen by 

 the increased interest and support given the station by the people of 

 the islands. 



