The agroclimatic-analogue (Homoclime) technique in plant introduction and distribution of new selections
1949
Hanson, H.C.
The study of the suitability of various geographic areas for the growing of crops has been pursued along two lines: first, the investigation of the environmental requirements of species and varieties, and, second, the collection of environmental data in the area under study and making comparisons with other regions, especially by means of classifications. In order to serve agricultural needs more fully the agroclimatic-analogue, or homoclime, technique, in which parts of these two methods have been combined, has been developed for application to practical agronomic and horticultural studies. According to this technique similar ecologic or agroclimatic areas are delimited in different countries of the world by the comparison of all available climatological, geographic, and soils data. Areas in the United States have been used as the standard for comparisons. This is followed by the growing of genetically homogeneous strains of plants in the delimited analogous areas for the purpose of securing phenological records for checking the delimitations which were made by the use of physical data alone. This technique aids in the selection of plants for introduction into a region and will facilitate the effective distribution of new strains and reduce the waste of limited supplies of new material. Several countries are interested in this technique, and it would develop more rapidly in the United States with the cooperation of a number of agricultural stations as key testing stations, particularly for determining the ecological amplitude of new strains.
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