Enterolobium contortisiliquum a nitrogen fixing tree species produces hardcoated and light brown colour seeds. Seed has physical dormancy due to hardiness of testa. Suitable pretreatment to break the dormancy was investigated. Germination was enhanced from 5.87% (untreated) to 93.17% (mechanical scarification). Although mechanical scarification treatment gives early, uniform and highest germination but it is not practicable in large-scale purposes. Therefore, sulphuric acid for 30 minutes soaking is recommended.
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