What number is designated by the Dewey Decimal System for books on agriculture?

The number designated by the Dewey Decimal System for books on agriculture is 630. In this classification system, the number 600 represents technology, and the 630s specifically cover agriculture and related sciences. This includes various aspects such as agricultural economics, practices, and the science behind crop and livestock production.

The other numbers fall into different categories within the Dewey Decimal System: 070 pertains to journalism and communication, 210 is associated with philosophy and psychology, and 820 is reserved for English and American literature. Thus, 630 is the most appropriate classification for works focusing specifically on agriculture.