THE MONTHLY BULLETIN. 



437 



It has been definitely determined that the olive requires, during the 

 growing period, a sura total heat of 7,200 degrees above freezing, to 

 properly mature the latest varieties. The following figures give the 

 average total degrees of heat, covering a period of thirty-six years, in 

 the principal towns of the olive growing districts of northern California 

 from May 1st to November 30th, inclusive, or 214 days in all : 



Florida and Arizona are the only other states of the Union that can 

 grow the olive commercially, owing to its susceptibility to the low tem- 

 peratures of the North, and its non-bearing in the humid atmospheres of 

 the Gulf States, which factors restrict its future expansion in Florida, 

 and while it thrives very well in southwestern Arizona, owing to the 

 limited water supply for irrigation the planting in that state is probably 

 limited to a small area. 



In Southern California the districts suitable for olive growing are 

 fast being filled with citrus, date, and walnuts, and as it is not adaptable 

 to the humid atmospheres of the coast counties, it follows that the future 

 plantings in this country must be done in the warm interior valleys of 

 California, where the climatic and other conditions are found to be 

 ideal for its best performance. 



COST OF PRODUCTION OF OLIVES IN SACRAMENTO COUNTY. 



By F. C. Brosius. 



NUMBER OF TREES. 



Mission. 15 years old 22 trees 



Manzanillo, 1.5 years old 249 trees 



Nevadillo, 15 years old 29 trees 



Total 300 trees 



CULTURAL COSTS. 



One team. 50 days cultivating and hauling @ ,$1.00 per day $50 00 



12i pounds fertilizer per tree (ci, 2 cents per pound 75 00 



One man's labor, during year, cultivating, pruning, etc 120 00 



Irrigation, per year 9 00 



Total cost of production .$2.54 00 



13i tons of pickle olives, picked. @ .$100.00 per ton $1,^50 00 



2 tons of oil olives, picked, (^ $30.00 per ton (iO 00 



Total receipts 1,410 00 



Total cost of production 2-54 00 



Balance -$l,lo6 00 



