Nauclea orientalis

Direct seeding to restore rainforest species: Microsite effects on the early establishment and growth of rainforest tree seedlings on degraded land in the wet tropics of Australia


In Queensland, Australia, three degraded sites (a high elevation site, mid elevation site and low elevation site) that were dominated by non-native grass were studied. The study looked at how six different methods of sowing affected the establishment and growth of small and large seeds, as well as how it affected weeds growth and re-establishment. Before the sowing treatments were conducted, the weeds, since it often outcompetes seeds/seedlings, were removed using herbicides. The sowing treatments created microsites that either consisted of the seeds being buried beneath the soil or placed above the soil.

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Restoration of degraded forest land in Thailand: the case of Khao Kho


This chapter discusses the deforestation of Khao Kho district, situated in Thailand’s central highlands, in the 1970s and restoration efforts in the 1990s. Over 75% of the district was forested until 1968, when as a counterinsurgency strategy the Royal Thai Army began to build roads, deforest the district and encourage agricultural settlement in this heretofore intact forest. Deforestation and maize cultivation on these steep hillsides, often with already-poor soil quality degraded in situ, led to rapid degradation with farming untenable by 1990. A UNDP-funded reforestation project – managed by the Army – was initiated in 1990.

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