Dlouhodobe zmeny ve vyuziti pudy v CSR (1845-1970)

The changes occurred in the land use on the Liberec and Česka Lipa county areas in years 1845-1905-1948-1961-1970 are examined. The development of the eight major land categories is documented, such as: arables, orchards (fruit orchards, vineyards, hopfields), meadows, pastures, forests, built-up areas, other land, which is taking place on the area of the counties as compared with the rest of the Socialist Republic of Bohemia. The main reasons of these changes are investigated. A method for the calculation of an index of the changes intensity of land use is advanced. This index is employed for and illustrative presentation of the structure of and resources in individual years. The following data are tabaulted: 1. development of land resources in Bohemia in successive periods, 2. comparison of intensity of the changes for the town of Liberec, 3. Intensity of changes for some of the rural districts of the Liberec county (poviat). The cartogram illustrates the intensity of changes that occurred in years 1845-1970 in the part of the county under study: the rural districts considered are given in Table 3. In conclustion the author deals with the regularities discovered. The land use structure alters within larger units: the former homogeneity of the land resources of the fundamental units becomes lost, he concludes. The regularities found will be verified from analogous studies for other areas.