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Allometric equations for the estimation of tree volume and aboveground biomass in a tropical humid forest were developed based on direct measurements of 19 individuals of seven tree species in Northern Costa Rica. The volume and the biomass of the stems represented about two-thirds of the total v...


Segura, O.Kanninen, M.[Allometric models for estimating volume and total aboveground biomass of seven dominant tree species in a tropical humid forest in Costa Rica]Allometric models for estimating volume and total aboveground biomass of seven dominant tree species in a tropical humid forest in Costa Rica

One of the first steps in estimating the potential for reducing emissions from deforestation and forest degradation (REDD) initiatives is the proper estimation of the carbon components. There are still considerable uncertainties about carbon stocks in tropical rain forest, coming essentially from...


Laumonier, Y.Kanninen, M.Munandar, A.W.[Landscape-scale variation in the structure and biomass of the hill dipterocarp forest of Sumatra: Implications for carbon stock assessments]Landscape-scale variation in the structure and biomass of the hill dipterocarp forest of Sumatra: Implications for carbon stock assessments

Since 2003 India has been actively promoting the cultivation of Jatropha on unproductive and degraded lands (wastelands) for the production of biodiesel suitable as transportation fuel. In this paper the life cycle energy balance, global warming potential, acidification potential, eutrophication ...


Achten, W.M.J.Almeida, J.Fobelets, V.Bolle, E.Mathijs, E.Singh, V.P.Tewari, D.N.Verchot, Louis V.Muys, B.[Life cycle assessment of Jatropha biodiesel as transportation fuel in rural India]Life cycle assessment of Jatropha biodiesel as transportation fuel in rural India

Presents data on the geomorphology, vegetation structure and ecological units identified at Medacho & Did Hara areas of Ethiopia, comparing effects of rangeland utilization in order to derive conclusions on their management by pastoralists, with particular reference to grazing pressures applied t...


Bille, Jean-ClaudeEshete, A.[Rangelands management and range condition: A study in the Medacho and Did Hara areas of the effects of rangeland utilization]Rangelands management and range condition: A study in the Medacho and Did Hara areas of the effects of rangeland utilization

Plantain grown after forest slash-and-burn raises concerns due to the release of CO2 and the destruction of biodiversity. Plantain yields are presented after forest biomass was burned or retained in combination with sucker sanitation versus traditional planting. Biomass burning did not affect pla...


Hauser, S.Mekoa, C.Ngo Kanga, F.[The effects of burning forest biomass on the yield of plantain (cv. Ebang, Musa spp. AAB, false horn) after hotwater and boilingwater treatment in Southern Cameroon]The effects of burning forest biomass on the yield of plantain (cv. Ebang, Musa spp. AAB, false horn) after hotwater and boilingwater treatment in Southern Cameroon

A short-term improved fallow system based on forage legumes for enhancing crop and livestock components of mixed farming systems was tested in the subhumid zone of West Africa. As part of the evaluation, the ability of 11 legume species (Centrosema macrocarpum, C. pubescens, Stylosanthes guianens...


Muhr, LTarawali, Shirley A.Peters, MichaelSchultze-Kraft, Rainer[Forage legumes for improved fallows in agropastoral systems of subhumid West Africa. II. Green manure production and decomposition after incorporation into the soil]Forage legumes for improved fallows in agropastoral systems of subhumid West Africa. II. Green manure production and decomposition after incorporation into the soil

Carbon storage and sequestration in tropical mountain forests and their dependence on elevation and temperature are not well understood. In an altitudinal transect study in the South Ecuadorian Andes, we tested the hypotheses that (i) aboveground net primary production (ANPP) decreases continuous...


Moser, GLeuschner, CHertel, DGraefe, S.Soethe, NIost, S[Elevation effects on the carbon budget of tropical mountain forests (S Ecuador): The role of the belowground compartment]Elevation effects on the carbon budget of tropical mountain forests (S Ecuador): The role of the belowground compartment

Inadequate nitrogen nutrition is a major constraint to the performance of common bean (Phaseolus vulgaris L.) in sub-Saharan Africa. Twenty six lines selected for good performance under N-limiting conditions were further evaluated at two locations in Uganda to determine the mechanisms allowing go...


Wortmann, Charles S.Silver-Rwakaikara, MLynch, J[Efficiency of nitrogen acquisition and utilisation in common bean in Uganda]Efficiency of nitrogen acquisition and utilisation in common bean in Uganda

The effect of different types of land management on the soil macrofauna of the savanna has been assesed using the T.S.B.F. method. Macrofauna of the forest and savanna has a high density (4293 and 2830 ind.m(2)) and moderate biomass (13.6 and 15.3 g.m(-2)). Traditional grazing significantly incre...


Decaëns, ThibaudLavelle, Patrick M.Jiménez Jaén, J.J.Escobar, G.Rippstein, G[Impact of land management on soil macrofauna in the Oriental Llanos of Colombia]Impact of land management on soil macrofauna in the Oriental Llanos of Colombia
Autor: Grollier, C

Estern Colombia, the Llanos, is constituted of broad grass formations. These big expanses of savannahs present a huge potential for extensive bovine breeding. Unfortunately, these natural pastures have a low productivity and a feeble quality, due to low fertility soils with a deficiency in phosph...


Grollier, C[Caracterisation des savanes d`une region des Llanos Orientaux de Colombie : Memoire de fin d`etudes, Cali, Colombie du 26 juin 1994 au 7 novembre 1994]Caracterisation des savanes d`une region des Llanos Orientaux de Colombie : Memoire de fin d`etudes, Cali, Colombie du 26 juin 1994 au 7 novembre 1994

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