Crops

The cultivated area of slender wheatgrass (Roegneria trachicaulon) .

Object description Download GIS-layers

Authors:

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

Date of creation:

05.03.2004

Scale:

1:20,000,000.

Accuracy of map:

The map was created using maps to the scale of 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. Polygons represent area of possible distribution of the species.

Accuracy of classifier:

Polygons are based on literature sources, herbarium samples, political boundaries and field surveys by the authors.

Method of map production:

Historical agricultural statistics were reviewed at the regional level. The Former Soviet Union had 16 regions. The boundaries shown on the 1:4,000,000 Map of Arable Lands (Koroljeva et al., 2003) were used to further refine crop distribution. The final map was constructed according to regional maps, the Map of Arable Lands (dark blue polygon) and maps of lands used for cultivation within non-arable land zone (light blue polygon). Only those lands where Roegneria trachicaulon is used in crop rotation were taken into account.

Reference citations:

Catalog of state permitted cultivars of agricultural crops. 1969. Moscow: Kolos, 489 pp. (In Russian)
Catalog of state permitted cultivars of agricultural crops. 1971. Moscow: Kolos, 488 pp. (In Russian)
Catalog of state permitted cultivars of agricultural crops. 1974. Moscow: Kolos, 480 pp. (In Russian)
Catalog of state permitted cultivars of agricultural crops. 1985. Moscow: Kolos, V. 3: 489 pp. (In Russian)
Koroljeva I.E., Vilchevskaya E.V., Ruhovich D.I. 2003. Digital Arable Land Map. Laboratory of Soil Information of the Dokuchaev Soil Institute, Moscow, Russia [Based on: Yanvareva L.F. (ed.), Martynjuk K.N., Kisileva N.M. 1989. Map of Land Use, Faculty of Geography, Moscow State University, Moscow, Russia.].
State register of breeding achievements permitted for utilization. 2003. Plant cultivars. Moscow: 236 pp. (In Russian)

Rights and copyrights:

Copyright on the map and its descriptions belong to its authors;
Copyright on the photos belongs to Dzyubenko, N.I.