Climatic and edaphic conditions at eragrostis lehmanniana nees sites in Arizona,USA and the cape province,RSA and potential seeding sites in Southern Africa |
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| Authors: | Jerry R Cox JL Stroehlein JH Fourie |
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| Institution: | 1. U.S. Department of Agriculture , Agricultural Research Service , 2000 E. Allen Road, Tucson, Arizona, 85719, USA;2. Soil and Water Department , University of Arizona , Tucson, Arizona, 85721, USA;3. Sentraalwes Agricultural Centre , P.O. Box 677, Bloemfontein, 9300, Republic of South Africa |
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| Abstract: | Climatic and edaphic conditions at Eragrostis lehmanniana Nees sites in southeastern Arizona, USA were compared with those in the Cape Province, RSA to determine a range of conditions under which the species might be expected to establish and persist in southern Africa. Mean annual precipitation amounts and temperature extremes were highly variable where Lehmann lovegrass predominates, but in most summers precipitation accumulations ranged from 150–220 mm and temperature extremes ranged from 20–35°C in 30–40 days. Soils at Lehmann lovegrass sites in the Cape Province were more coarse textured and nutrient concentrations were usually less than at sites in southeastern Arizona; but trends in particle‐size distributions and measured chemical concentrations were generally equivalent. Climatic and edaphic conditions in central Botswana and northeastern Namibia generally range between those in southeastern Arizona and the Cape Province, RSA and we expect that seeded Lehmann lovegrass stands in these areas would enhance semi‐desert grassland productivity. |
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| Keywords: | Northern and Southern hemispheres Sonoran and Kalahari deserts climatic and edaphic comparisons |
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