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Table 4 Acid treatment: Relative germination rate of Adansonia digitata seeds in percentage

From: Adansonia digitata germination tests. Elephants or heat: what causes scarification of seed to facilitate germination?

Treatment0–2 weeks3–4 weeks5–6 weeks7–8 weeks9–10 weeks
H2SO4 for 5 min00000
H2SO4 for 10 min0.3a5.7a1a0a0.3a
H2SO4 for 15 min212000
HCl for 1 h, pH 200000
HCl for 1 h, pH 300110
HCl for 2 h, pH 201000
HCl for 2 h, pH 302000
Elephants´ digestion, germinating in soil0.7a1.7a0a0.3a0a
Elephants´ digestion, germinating in elephants´ faeces01000
  1. Numbers marked with aare the average of the germination tests (2017, 2018, 2019) the remaining numbers are obtained in the test sets in 2018 or 2019