Ecological studies of the vegetation of the Sudan. II. The germination of seeds and establishment of seedlings of Acacia senegal (L.) Willd. under controlled conditions in the Sudan.
cf. F.A. 32 Nos. 4094, 6036.] Seeds were sown on (a) undisturbed forest sites, (b) sites cleaned by pulling out the weeds, and (c) hoed forest sites, in Kordofan. On all three sites, ca. 84% of the seed was destroyed before or at the time of germination, mainly by insect larvae and millipedes. Subsequent seedling mortality was attributed mainly to high soil temperatures and low soil moisture during the dry season. Survival of seedlings up to the third rainy season was significantly better on (b) and (c) than on (a). In a related study in a nursery, moderate to light mulch provided significantly better conditions for seed germination and seedling establishment than either dense mulch or no mulch. KEYWORDS: Abies senegal \ Sowing, direct losses, mortality, results \ Sowing, direct \ site preparation \ for