“Francine Raymond surveys the seed catalogues that have been ignored until now to plan which veggies and flowers she will grow during 2011” begins the article “How to Plan and Plant Your Veg and Flowers This Year” (The Telegraph). The article “Seed Catalogues Plant Dreams” (Washington Post) focuses on vegetables for “A Cook’s Garden,” and “Garden Catalog Season: New Isn't Necessarily Better” (Christian Science Monitor) emphasizes flowers. All the articles mention tempting new varieties and old favorites found in the seed catalogs; the last article praises some new varieties (“Supertunias are ‘petunias on steroids,’ hybrids bred to have small flowers and good disease-resistance, to self-prune, and to bloom from spring until fall”) and grumbles about others.
Where are works on production of seeds for gardens classed? Browsing the Relative Index for “seeds” yields:
. . .
Seeds—descriptive botany 581.467
. . .
Seeds—nursery production 631.521
. . .
Seeds—nursery production—ornamental plants 635.91521
The interdisciplinary number for seeds in general—the number that appears directly opposite the term “Seeds” (581.467)—is a descriptive botany number; it is not a likely number for garden seeds. Gardening is an applied science. At 500 Natural sciences and mathematics is a see reference: “For applied sciences, see 600.” At 580 Plants is a scatter see reference: “For a specific aspect of plants, see the aspect, e.g., plant cultivation 631.5.” See references have hierarchical force. Also, at 580 Plants is the relocation note “Interdisciplinary works on plants of agricultural importance relocated to 630.” The following two Manual notes help explain the differences between 630 and 579–590 numbers:
630 vs. 579–590, 641.3
Agriculture and related technologies vs. Natural history of specific kinds of organisms vs. Food
Use numbers in 630 for interdisciplinary works on domestic plants and animals, or works discussing species known almost exclusively in agriculture. Use numbers in 630 as the interdisciplinary numbers for species if the work discusses varieties not known in nature. Use numbers in 579–590 for interdisciplinary works on plants and animals in general.
. . .
635.9 vs. 582.1
Flowers and ornamental plants in agriculture vs. Herbaceous and woody plants, plants noted for their flowers
Use 635.9 . . . for works that emphasize plants to be cultivated or appreciated in human-made settings. Use 582.1 for works that emphasize the plants in nature or their biology. If in doubt, prefer 635.9.
. . .
The comprehensive number for production of agricultural seeds is 631.521 Seeds. It has in its upward hierarchy 631.52 Production of propagational organisms and new varieties. Examples of works classed in 631.521 Seeds are:
• Handbook of Seed Science and Technology
• Seeds Handbook: Biology, Production, Processing, and Storage
• The Wisdom of Plant Heritage: Organic Seed Production and Saving
The number 631.521 Seeds covers all agricultural crops; it is too broad for works limited to garden seeds. Browsing the Relative Index for “gardening” and looking down to “gardens” yields:
. . .
Browsing the Relative Index for “vegetables” yields:
Vegetables—garden crop 635
Because of the dual heading at 635 Garden crops (Horticulture) Vegetables, the number is used for garden crops in general and for vegetables alone. The subdivision 635.04 Cultivation, harvesting, related topics has a footnote: “Add as instructed under 633–635.” Works on production of garden seeds in general and on production of vegetable seeds are classed in 635.0421 Garden seeds (built with 635.04 plus 21 from 631.521 Seeds, following the footnote instruction at 635.04 and the instruction under 1–6 Cultivation and harvesting in the add table at 633–635 Specific plant crops.) An example of a work classed in 635.0421 Garden seeds is Vegetable Seed Production.
Browsing the Relative Index for “flowers” yields:
The entry 635.9 Flowers and ornamental plants has the class-here note: “Class here floriculture”; hence subdivisions of 635.9 can be used for flowers alone. Works on production of seeds for flowers and ornamental plants are classed in 635.91521 Flower and ornamental plant seeds (built with 635.91 Specific techniques; apparatus, equipment, materials plus 521 from 631.521 Seeds, following instruction at 635.91). An example of a work classed in 635.91521 Flower and ornamental plant seeds is Flower Seeds: Biology and Technology.