Gmelina arborea

Amelioration of degraded rain forest soils by plantations of native trees

background

While much has been studied about the ability of tree growth to improve degraded soils in temperate zones, less is known about the impacts of tree growth on degraded soils in tropical zones.

research goals & methods

This study looks at the effects of trees planted in abandoned pasture land in northeastern Costa Rica, 25 years after that land had been cleared of rainforest. The soil was sampled before tree planting and 4 years after the trees became established. 

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Understory Vegetation in Fast-Growing Tree Plantations on Savanna Soils in Congo

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The study investigates the hypothesis that tree plantations established adjacent to natural forests may catalyze the regeneration of natural forest biodiversity in the Congo.

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Indigenous Trees in West African Forest Plantations: The Need for Domestication by Clonal Techniques

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This study evaluates native species tree plantations across West Africa by summarizing existing information on the yield of those plantations, with particular focus on the Cameroon Forest Management and Regeneration Project. It considers the potential for vegetative propagation and clonal selection to increase growth rates and marketability of native species.

Open access copy available

Financial, Economic and Environmental Profitability of Reforestation of Imperata Grasslands in Indonesia

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This study assesses the profitability of roundwood production in forest plantations established on Imperata grasslands in South Kalimantan, Indonesia.

Research Goals & Methods

This study uses the discounted cash flow method on the Riam Kiwa reforestation trial area. It also explores the importance of fiscal incentives to financial profitability of roundwood production in forest plantations established on Imperata grasslands.

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Manual of Reforestation and Erosion Control for the Philippines

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This manual provides a detailed guide to reforestation, including information about species selection, nursery techniques, site preparation and plantation design, weed and fire control, stand improvement and other practical aspects of establishing and managing tree plantations. Additionally, there is a large portion devoted to erosion control, using trees and engineered structures to stabilize slopes and decrease the velocity of water runoff.

Open access copy available

Forest Plantations in Costa Rica and Nicaragua: Performance of Species and Preferences of Farmers

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This paper presents data on the survival and growth of mixed native and exotic forest plantations established on abandoned pastures in Costa Rica and Nicaragua. The article also includes information on farmer species preference and socioeconomic information.

Open access copy available

Helping Forests to Help Themselves—Accelerating Natural Regeneration

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This chapter walks through the basic techniques of accelerated (or assisted) natural regeneration (ANR), describing when it is appropriate, when it should be combined with other techniques, how to increase the seed rain, and areas of needed research.

Open access copy available

Variability and Grouping of Leaf Traits in Multi-Species Reforestation (Leyte, Philippines)

background

Research on functional diversity is an important part in ongoing efforts to identify appropriate native tree species for reforestation projects. Increasing understanding of easy to measure physiological characteristics, such as specific leaf area, can help predict a variety of functional characteristics as well as growth perfromance.

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Impact of Plantation on Ecosystem Development in Disturbed Coal Mine Overburden Spoils

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This study evaluates the growth, survival, understory composition, and soil conditions in a plantation established on a mine site in India.

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Evaluation of Reforestation Potential of 83 Tree Species Planted on Imperata cylindrica Dominated Grassland – A case Study from South Kalimantan, Indonesia

background

In this study, 83 tree species (native and exotic) were tested for their growth and survival in species selection trials in South Kalimantan, Indonesia.

Research Goals & Methods

The trees were planted between January 1987 and December 1988 in areas dominated by the exotic grass Imperata cylindrica and weeding was conducted twice a year.

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