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Artificially buried seeds were followed by periodic exhumation and germination during 21 months in Kondoa Irangi Hills, central Tanzania. Viable seeds from thirteen selected species were buried in polythene envelopes at a depth of 15 cm below woodland vegetation. Lethal germination, fungal decay and insect infestation were singled out as the most important contributors to loss of viability among seeds. Hierarchical clustering based on a seed's mean viability, seed shape and presence or absencedoi:10.4314/tjs.v34i1.44283 fatcat:zhtscnelq5hqdofx2od6suw52y