Crops

The cultivated area of swedish or Hybrid Clover (Trifolium hybridum L.).

Object description Download GIS-layers

Authors:

The experts - Dzyubenko N. I., E. A. Dzyubenko.
The GIS-Expert - Dzyubenko A. N.

Date of creation:

18.12.2003

Scale:

1:20.000.000.

Exactness of a map:

The map was created using maps that had the following scale 1:25.000.000-1:40.000.000.

The projection:

"Alber's Equal Area Conic for Russia", 9, 1001, 7, 100, 0, 44, 68, 0, 0

Basic contents:

Map is a vector file consisting of polygons.

Exactness of classifier:

Polygons are based on literature sources, political boundaries and ecological description.

Method of map construction:

The cultivated area of Trifolium hybridum is founded on the base of agroclimatic, natural and economical principles of former USSR countries territory division. The vast information on the problem published in open press was analyzed. The final map was constructed by generalization of regions. maps, arable-lands. map (dark blue polygon), map of lands permitted for cultivation without non-arable-lands (light blue polygon). Only those lands where Trifolium hybridum took place in crop rotation were taken into account.

Sources of the data:

Catalog of state permitted cultivars of agricultural crops. 1969. - M.: Kolos, 489 pp. (in Russian).
Catalog of state permitted cultivars of agricultural crops. 1971. - M.: Kolos, 488 pp. (in Russian).
Catalog of state permitted cultivars of agricultural crops. 1974. - M.: Kolos, 480 pp. (in Russian).
Catalog of state permitted cultivars of agricultural crops. 1985. - M.: Kolos, Vol 3. - 489 pp. (in Russian).
Catalog of agricultural crops. cultivars permitted in Byelorussia. 1985. - Minsk: Uradjai, 176 pp. (in Russian).
State register of breeding achievements permitted for utilization. Plant cultivars. 2003. - M.: - 236 pp. (in Russian).
The register of plant cultivars in Ukraine. 1996. - Kiev: Urojai, 259 pp. (in Russian).
The database of regions where the cultivars of the species are permitted to cultivate, founded on the base of literary date analyses.

Rights and copyrights:

Copyright on the map and descriptions belong to its authors;
Photo Afonin A.N.