12 Lost in the Dewey woods: Forestry 634.9

As a forestry professional (recently retired!), I’ve naturally collected a lot of books and reports pertaining to Forestry and Forest Products, in their various manifestations. My struggles with classifying these documents started with the Oxford Decimal Classification (ODC) system, which was my first introduction to this delectable pastime!

I’ve finally relocated my copy of the ODC, from one of the hundred boxes that I brought back from New Delhi to Bangalore on retiring, so let me share something about this classification system just for Forestry. Its original version was devised in large part by Swiss forester Philipp Flury, a member of the Bibliographical Committee of the International Union of Forest Research Organisations (IUFRO) by 1933, and assigned the decimal notation 634.9F to distinguish it from the head 634.9 in the Universal Decimal Classification (UDC). One of the Chairmen of the Committee was Prof. R.S.Troup (Oxford), which establishes a strong Indian connection, Troup being one of the best known British Indian foresters and author of many volumes on Indian Silviculture from the Forest Research Institute, Dehradun. A completely revised version of the ODC was prepared by a post-war Committee, largely by P.G.Beak, Assistant Director of the Bureau, and presented by Ford Robertson, Director of the Commonwealth Forestry Bureau, Oxford in 1948, and after discussions, was adopted in the IUFRO Congress in Rome in September 1953.

The ODC groups the field of Forestry into ten broad classes, starting with 0, for "General works on forests, forestry and the utilisation of forest products", through 1 (Factors of the environment, Biology), 2 (Silviculture), 3 (Work Science, harvesting), 4 (Forest injuries and protection), 5 (Forest mensuration), 6 (Forest management), 7 (Marketing, economics of forest transport and wood industries), 8 (Forest products and their utilisation), and 9  (Forests and forestry from the national point of view, social economics of forestry). The application of sciences like genetics, botany and ecology are covered under 1.

An interesting aspect is that the UDC (Universal Decimal Classification), the European version of the DDC, now uses 630 for Forestry (rather than Dewey’s 634.9, which fits between 634 Horticulture and 635 Gardening), and recommends the use of ODC numbers (with an interpolated asterisk) to form class numbers: thus, 630*1 for "Environmental factors, forest biology", 630*2 for "Silviculture", and so on. (My source for UDC numbers was the International Medium Edition, FID publication no.571, BS 1000M: Part 1: 1985). This combination of two systems provided fairly detailed heads, but there were confusions still, especially for general works on forest economics and history, which are somewhat repetitious in the ODC.

An interesting feature of UDC is the provision for making composite numbers from two different numbers or concepts, using the colon (:) as the connector or concatenator. This is a neat device that enables you to create new categories to your heart’s content. Thus if you want to make a new heading for the effect of climate on forests, you can just take the numbers for Forestry  and for Climate, and join them with the colon. I found this especially useful in joining Forest Management to Community Participation for documents on Joint Forest Management (JFM), thus 630*6:364.462 – the first number is UDC 630 with ODC 6 for “Forest management”, the latter number UDC 364.462 referring to “Participation of the people in decision-making. Democratization. Grass-roots democracy”, which fits exactly. Instead of 630*6, we could use 630*9, the 9 from ODC representing “Forests and forestry from the national point of view. Social economics of forestry”. There’s no separate category for JFM in the UDC or the DDC, as it is something that has developed only in the last two decades. 

The possible downside of this creative license is that each person can form their own new categories, and standardisation is lost. Dewey doesn’t allow this freedom. Any synthesis of numbers from different parts of the DDC has to be done only where expressly permitted, and then as per the instructions provided. Yes, there is one provision in the Standard Subdivisions, applicable to more or less any number from 000 to 999, which lets you relate the subject to to any scientific aspect by adding 01 as a connector, followed by the number from the Sciences (510 to 590). Thus, "Application of the principles of plant genetics to forestry" 634.9’0158115, from 634.9 Forestry and 581.15 Genetics, under the number 581 Botany (we are talking about DDC 20 here; the corresponding number in DDC 22 would be 581.3, Genetics and evolution, under 581 Specific topics in natural history of plants). Unfortunately this nifty trick isn’t provided for with subjects under Technology (600’s), as 016… introduces "Indexes", not application of 600 subject heads; and 019 is "Psychological principles", not the subject in relation to "Geography and travel"!

There are a few numbers to which the entire gamut of subject headings 001 to 999 can be added, such as 338 Production economics, which allows any subject to be related thus.  Also, the Standard Subdivisions do provide a general rule for appending reference to "Place" from Table 2 to any subject number, with the connector ’09: ’094 is Europe, ’095 Asia and so forth (the apostrophe is just a mark to group digits, and need not be shown in actual numbers). This is probably the most widely used mode of subdivision of a topic, and neatly groups documents by continent and country. In some numbers, the 9 need not even be added, as it is already provided in the main number: for instance, Standard Subdivision ’060’3-9, for Organizations in different countries, leaves out the connecting 9, thus 634.9’0604 Forestry organisations in Europe, and so on.

All such aids are welcome, for the DDC 634.9 Forestry is woefully underpopulated compared to ODC. Further, forestry subjects are scattered between 634.9 (forestry), 639.9 (biodiversity conservation), and 333.75 (forest lands), not to mention "forest ecology" under 577.3 (DDC 22). I will present some of the compound numbers I use to gerrymander forestry topics into the DDC mode in the next section.