Inventory records concerning trees are most often kept in inventory books. As a rule, such books contain only species data and possibly the most important dendrometric features. It is insufficient for the rational cultivation of trees.

Card file. Better than books is a file on punched IS cards with an alphabet. The following information is entered on the card:

1) type, area, lodging, section, street, tree number;

2) ecological conditions: soil cover, undercoat, crowns short circuit, soil properties, water (soil and air moisture), air (degree of pollution);

3) the year when the tree was planted, his age, dendrometric data (height, breast height diameter, crown projection diameter);

4) health condition: mechanical and biotic damage and the treatments used.

Data concerning the information mentioned are entered in the card's fields, and some of them are coded by cutting a strip from the edge of the card to the appropriate perforation hole. These openings are marked with letters or numbers and are intended to encode the information listed in the individual boxes. Cards are stored in standardized boxes. Rules for filling in boxes and data encoding. The exact name of the tree (species and variety) is given under the heading "species". It is coded as needed in the upper perforation line. The openings from G-1 to M-Z are intended for deciduous species arranged alphabetically according to the needs of a given facility (families, types, species). Coniferous species are coded in the right perforation line in the holes P-1 to P-16.

To code your location (described in the appropriate boxes) holes from D-1 to D-16 in the lower perforation line are intended. If necessary, a different division of information than provided for in the boxes (e.g.. defining the city district) adjustments should be made at the appropriate level of location in the above holes. However, in other facilities (e.g.. cities, districts) it is recommended that, to number the appropriate units of spatial division moving from north to south and from east to west. The "No." column corresponds to the numbering on the site's stand plan, with the help of which a plan is used to find a tree in the field. For practical reasons, four-digit or greater numbers should be avoided. Therefore, in objects with stands of several thousand people, trees should be numbered on an ongoing basis in individual spatial division units (regions, sections, districts etc.), and they are numbered similarly to spatial divisions - from north-east to south-west. This makes it much easier to find trees in the field.

Ecological conditions are coded in the left perforation line. I-L holes, E-H- and A-O in this perforation line are a reserve.

E holes are intended for the cover, F, G, H, which encode the following characteristics of the substrate:

- exposed soil or undergrowth (H);

- loose turf, compact or lawn (G);

- permeable surfaces (use, trampled ground) (F);

- impermeable surfaces (plates, concrete, asphalt) (E).

The most onerous factor is coded. On at-
the entry in the field "coverage" is entered 1/2 asphalt, 1/2 lawn; it means, that the tree grows on an alley covered with asphalt, so asphalt is coded (hole E). Undergrowth of shrubs and young trees is a valuable indicator of air conditions, soil moisture and nutrients and an indicator of microclimatic conditions under the tree. It is distinguished and entered in this column: no lining, herbaceous plants, single shrubs or trees. This data is not coded.

Information on the arrangement of trees is entered in the "crown short circuit" box and encoded in the left perforation line in holes marked with D, C, B, A. The following types of short circuit are distinguished:

- free-standing tree (D);

- one short circuit- or two-sided (C);

- four-side short circuit (A).

There are tree symbols in the rubric (colic) marked with dashes, from which side of the world the short circuit occurs, north is up. In justified cases, a vertical short circuit can be distinguished, i.e.. the canopy of neighboring trees filling the space, and the sociological position of trees, distinguishing only dominant trees (dominant) and composed.

The soil type should be indicated under the heading 'soil', if possible. When it comes to trees growing in the streets, we often limit ourselves to the statement, whether it is natural soil or rubble or dump. A fertile soil is coded, natural in V-Z holes, naturally poor (sands) in R-U holes, rubble, dump in the M-Q holes.