81 



Of the entire series, the Riverside Navels show the hi^^hest content of albuminoids 

 (1.54 i)er cent), while the averaj^o of the Pomona sainplo is I.IH per cent only. Next 

 hif^ht'st to the Iviversido Navels conic the St. Michaels from Marysville, Riverside, 

 and I'oniona, with an avc-raj^oof 1.4 per cent; nearly the .same is shown by the K'iver- 

 side Malta liloods. The averaj^e of tlic Mediterranean Sweets falls below 1 per cent, 

 that from Pomona falling to O.iU per cent. The Malta Hlood and Niles seedlin<^ show 

 the minima of 0.t)'.( per cent and (l.7.'> per cent. The Valencia and Tangerine, with 

 the Eureka lemon, seem to range about 1 per cent. 



Ash composition and nitrogen content. — As will be seen by reference to HuUetin No. 

 88 of the station [see Experiment Station Record, vol. Ii, p. 2721, tbe orange stands 

 second (grapes being lirst) among orchard fruits iu the quantity of mineral matter 

 withdrawn from the soil. Heretofore we have been obliged to base all conclusions 

 bearing upon the ash and nitrogen of these fruits on European data; we are now 

 enabled to present for oranges and lemons the outcome of California growth. The 

 following summary (based on averages from the large table) shows in tabular form 

 the amounts, in pounds, of the sdII ingredients extracted by an orange or lemon crop 

 that will have to be replaced by fertilization. 



Orangps: 



European (sepdliss) — 

 Ciop of 1,000 poiiiids 

 Crop of 20,000 poiiiidH. 

 California 



Crop of 1,000 pounds. 

 Crop of 20,000 pounds 



Lemons : 



Crop of 1,000 pounds 

 Crop of 20,000 pounds 



Total 



Pounds. 



6.07 



121.40 



4.32 

 80.40 



5.57 

 111.40 



Potash. 



Pounds. 



2.78 

 55.60 



2.11 

 40.14 



2.69 

 53.80 



Phosphoric 'v;t»„..— 



Pounds. 

 0.67 

 13.40 



0. .M 

 10.60 



O.Ol 

 12.20 



Pounds. 

 2.69 

 53.80 



1.83 

 36.60 



1.51 

 30.20 



It thus appears that so far as oranges are concerned the California fruit draws 

 materially less upon all the soil ingredients that have to be replaced by fertilization 

 than the European; while as regards the lemon, it approaches closely to the Euro- 

 pean standard for the orange, save in the much smaller draft upon nitrogen. » • • 



Lemons. — The incompleteness of the data concerning lemons renders it inadvisable to 

 enter upon any extended discussion, the more so as no extended data from the Old 

 World are available for comparison. It will be noted that the most important 

 ingredient of this fruit, viz, the acid percentage, considerably exceeds, for the Eureka 

 lemon [7.G6 per cent] at least, the commonly assumed average, and in the case of 

 No. '2(1, from San Gabriel [7.88 per cent], the aci<l percentage is extraordinary. This 

 point alone should insure to California-grown lemons a high po.sition iu commerce. 



The relatively large percentage of sugar shown by the analyses is a feature which 

 will further commend them to the consumer's taste as against the percentages usually 

 reported. It will be observed, however, that very great diU'erences exist in the pro- 

 portion of rind to llesh and extractable juice. In this respect the lemons of Pomona 

 [2.22 per cent] and Ontario [2.157 per cent] stand at the head of the list as far as 

 it goes. 



In ash composition there is no material dilFerence between the oranges and lemons 

 examined. With a more extended series the variations in both would doubtless be 

 shown to run parallel. 



Colorado Station, Third Annual Report. 1890 (pp. 227). 



Report of Director, C. L. Ingersoll, ^l. S. (pp. 3-9). — Brief 

 stateuieuts regarding the work of the station in 1800. 



Plan of experiments for 1890 (pp. 10-13). — An outline of the 

 work planned for the sections of agriculture, chemistry, meteorology 



