Abstract
Seed germination and seedling growth of Acacia nilotica, Albizia lebbeck, Pithecellobium dulce and Prosopis juliflora were studied under alkalinities of sodium carbonate and sodium bicarbonate for 30 days in solution and soil culture. The seed germination decreased and delayed with increasing alkalinities and it was significantly (P< 0.05) lower in soil culture than the solution culture. The seed germination and seedling growth occurred up to pH 10.0 in A, lebbeck and P. ducle while it continued up to pH 11.0 in the remaining two species.
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