21 



The map on the last page indicates divisions of the state according 

 to the prevalence of similar climatic conditions which roughly deter- 

 mine agricultural adaptations, viz. : 



1. Northwest Coast Region. 3. Southern Coast Region. 



2. Central Coast Region. 4. Interior Valley Region. 



5. Mountain and Plateau Region. 



The Northwest Coast Region. This section is mountainous, being 

 covered principally by the Coast Range. The valleys are relatively 

 small and irregular. The important climatic features of this section 

 are the moderate temperatures throughout the year, the high annual 

 rainfall, and the prevalence of high winds and fogs along the coast. 



At Eureka in Humboldt County the highest temperature recorded 

 is 85.2 (June 6, 1903), while the lowest is 20 (January 4, 1888). In 

 most portions of this section the rainfall varies from 40 to 100 inches. 

 This variation, however, is mainly due to elevation. It should be noted 

 that from year to year the rainfall may vary in any one place more 

 than 100 per cent, and as stated above it is always smallest in July 

 and August. 



This section most nearly resembles the east-north central and middle 

 Atlantic states in its agricultural operations and possibilities. It is 

 eminently suited for the production of forage grasses and clover and 

 to dairying, and has also demonstrated success with several fruits in 

 proper soils and exposures. 



The Central Coast Region. This region includes coast slopes, many 

 small valleys and a few of considerable size, and a large area of foot- 

 hills and mountains west of the high ridge of the Coast Range, which 

 at several points attains an elevation of about 4000 feet. Among the 

 valleys are those of the San Francisco Bay district the pioneer 

 regions of commercial crop-growing and which now constitute one of 

 the largest highly developed and densely populated agricultural dis- 

 tricts of the state. Central in this district lies the City and County 

 of San Francisco, which enjoys the unique distinction of having 

 produced the tallest sky-scrapers and the broadest cabbage fields in 

 the state. North of San Francisco are the coast valleys which are 

 great producers of dairy and poultry products, fruits and 'field crops, 

 and south of San Francisco are the bay-shore valleys long noted 

 for truck-crops, fruits the prunes of Santa Clara and the apples of 

 Pajaro valleys and the hay, grain, and sugar beets of Salinas and 

 Santa Maria valleys, while adjacent hill lands are largely used for 

 grazing and, on the coast side, for the dairy industry. 



The Central Coast Region is very diversified in topography, inter- 

 mediate in temperatures and rainfall between its neighboring coast 



