44 



H. A. R. Austin, Field Assistant, Oaliii. 



Mr. Austin spent 3^ days in the field and visited three stream 

 gaging stations on one rainfall station. The balance of the month 

 Avas spent in the Honolulu office on computations, map trac- 

 ing, etc. 



G. R. White, Field Assistant, Oahii. 



]\Ir. White spent 18 days in the field, established 18 stations, 

 constructed eight weirs, visited 19- stations, and made 29 meas- 

 urements. The balance of the month was spent in the Honolulu 

 office on computations, estimates, and general office work. 



Very respectfully, 



G. K. Larrisok, 

 Superintendent of Hydrography. 



THE KALO IN HAWAII (VIII). 



By \\\uGiiAN AIacCaughey and Joseph S. Emerson. 

 THE WET-LAND CULTURE OF KALO (Concluded). 



FERTILIZERS. 



All fertilizers should be applied before planting. Under most 

 conditions the best fertilizer for upland or unirrigated taro is 

 stable manure. The Hawaiians were familiar with the use of 

 burnt bone as fertilizer, calling this material pela. 



Mr. V. \. Clowes, with the Fer^eral Station, finds that a rather 

 liberal application of lime (1000 lbs. or more per acre) increases 

 the yield and checks the rot disease. A satisfactory fertilizer for 

 irrigated kalo consists of 300 lbs. ammonium suli)hate. 450 lbs. 

 sui)erp!iosphate, and 400 lbs. sulphate of potash per acre. 



Some very illuminating fertilizer tests with kalo have been car- 

 ried on by the h^deral .XgricuUural Experiment Station, and these 

 are reported as follows : 



*"In August, 1910, the station began .some fertilizer tests on 

 taro to determine the relative economic value of the use of fer- 

 tilizers in various proportions and mixtures. These experiments 

 were made in conjunction with the Kalihi Poi i'actory and upon 

 their taro plats. These experiments have been completed, and 

 the data accunndated therefrom present some results of consider- 

 able ])ractical value to taro growers, and in addition are of some 

 .scientific value. 



"The field was divided up into seven plats, each ai)i)n)\imately 

 one-twentieth of an acre in area. The fertilizer was applied on 



* Hawnii Ajfric. Kxpl. Sta. .\iiii H.pt I!I12. 



