Tran Duc Toan

The Fertilizer Institute

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Co-Authors

Didier Orange

Institut de Recherche pour le Développement

Do Duy Phai

Agricultural Genetics Institute

Jean‐Louis Janeau

Institut de Recherche pour le Développement

Christian Valentin

Iowa State University

Pascal Podwojewski

Institut de Recherche pour le Développement

Pascal Jouquet

Sorbonne Université

Nguyễn Duy Phương

Saigon University

Vincent Chaplot

Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques

Nguyễn Văn Thiết

Vietnam Academy of Agricultural Sciences

Fahmuddin Agus

National Research and Innovation Agency

Cooperative Institutions

Centre National de la Recherche Scientifique

Institut de Recherche pour le Développement

Sorbonne Université

Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement

Institut d'écologie et des sciences de l'environnement de Paris

Université Paris-Est Créteil

Université de Montpellier

Université Paris Cité

International Water Management Institute

Vietnam Academy of Agricultural Sciences

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Inpact of public spending on economic growth in Southeast Asia conuntries

DOAJ (DOAJ: Directory of Open Access Journals) (2020)

Nguyễn Quang Trung Tran Duc Toan

Public spending

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Long-term erosion measurements on sloping lands in northern Vietnam : impact of land use change on bed load output

Didier Orange Pham Dinh Rinh Tran Duc Toan Thierry Henri Des Tureaux M. Laissus

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Modélisation du fonctionnement hydrologique et géochimique de petits bassins versants agricoles. MOHYBVA, année 1

Didier Orange Charles Perrin Sylvain Huon Marc F. Benedetti Bruno Lidon

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Applying GIS-assisted modelling to predict soil erosion for a small agricultural watershed within sloping lands in northern Vietnam

Do Duy Phai Didier Orange Jean-Baptiste Migraine Tran Duc Toan Nguyen Cong Vinh

In Gebbie, L.; Glendinning, A.; Lefroy-Braun, R.; Victor, M. (Eds.). Proceedings of the International Conference on Sustainable Sloping Lands and Watershed Management: Linking Research to Strengthen upland Policies and Practices, National Agriculture and Forestry Research Institute of Lao PDR (NAFRI), Vientiane, Lao PDR, 2007. Vientiane, LAO PDR: National Agriculture and Forestry Research Institute of Lao PDR (NAFRI)

Watershed Management

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Citations (4)

Soil degradation and soil erosion control on sloping lands in Vietnam

Thai Phien Nguyen T. S. en Tran Duc Toan

Gully Erosion

Erosion Control

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Composition of animal manure and co-products

Vu Dinh Tuan Vincent Porphyre Jean-Luc Farinet Tran Duc Toan

This study was conducted to determine the real outflow of liquid effluents to be considered in balance calculations at the farm and regional levels in Vietnamese conditions. The variability of the chemical composition of a local dataset was analysed considering the highly heterogeneous wastes and byproducts used on crops. Near infrared spectroscopy (NIRS) was introduced to evaluate the feasibility of a rapid technique applied to animal wastes. Characterization of effluent outflows and water use and composition variation of solid co-products (compost and fish food) was carried out. Quantity of animal solid waste per pig head in the cold seasons was higher than in the hot season. Data collected from ten farms in Thai Binh (Vietnam), showed that the content of the main constituents in the fresh weight (FW) in the warm season was 17.3% OM total. Nitrogen, P2O5 and K2O totals were 160, 3.51 and 0.59%, respectively. Raising pigs in the cold season discharged 0.352kg N, 0.229 kg P2O5 and 0.148 kg K2O per metric ton live weight and he liquid part contributed 5.5, 2.1 and 12.8%, respectively. A total of 66 samples of compost and animal waste as fish feed were taken during summer, of which 46 were ready-to-spread compost, 20 others were animal excreta as fish feed. These results confirmed the fact that it is possible to use the animal waste source coming from the pig farms of Thai Binh province as a main nutrient for crops, especially for rice. After preliminary calibrations using NIRS spectrometry with local pig waste and co-products, perspectives are promising in terms of research and local development. A description of the design of the Chinese digester, more commonly called biogas digester and of the NIRS technique is provided.

Animal waste

Dry season

Animal Feed

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Nitrogen balance between animal wastes production, crops and fish ponds demand at commune level in Thai Binh province, Northern Vietnam : [Draft]

Tran Duc Toan Benoît Hillion Nguyem Ngoc Minh Vincent Porphyre Jean‐Michel Médoc

The agronomical balance in nitrogen at the commune level has been calculated between livestock-produced manure and the total demand in nutrients by crops and fish ponds, in the district of Vu Thu, Thai Binh province (Vietnam). Based on a conceptual Vietnamese-adapted model, calculations have underlined N surpluses in 50% of the studied communes during winter and the importance of waste waters that are expected to be the most important issue for environment regarding the 2010 provincial pig development plans. (Resume d'auteur)

Vietnamese

Nitrogen balance

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Stratégies traditionnelles de gestion conservatoire et de restauration des sols au Vietnam

Simon Pomel H. Pham Quang N. Van Thiet Didier Orange Pascal Podwojewski

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Evaluation of environmental factors and soil erosion in management of soil erosion consortium catchments

Vincent Chaplot A. Chanthavongsa Fahmuddin Agus A. Boonsaner R. O. Ilao

Gully Erosion

WEPP

Water erosion

Dryland salinity

Soil Management

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Evaluation of environmental factors and soil erosion in MSEC catchments

RePEc: Research Papers in Economics (2003)

Vincent Chaplot A. Chanthavongsa Fahmuddin Agus A. Boosaner R. O. Ilao

Although changes in land use or management practices most commonly modify surface runoff, soil erosion, and soil fertility, such processes are still very poorly documented at the scale of catchments. The Management of Soil Erosion Consortium (MSEC) initiated a research project in six countries ofAsia. MSEC provides the data collectedfrom catchments representative of a variety of situations. This study aims to test existing regression models (Phommasack et aI., 2001) for the prediction ofrunoffand annual erosion amounts over the study catchments. The data set for model generation consisted of annual budgets for 2001 from five catchments and 21 sub-catchments located in five countries of Southeast Asia (Indonesia, Laos, the Philippines, Thailand, and Vietnam). Runoff and erosion budgets from the 2002 rainy season for these catchments constituted the validation set. The runoff (R) model showed a root mean square error (RMSE) of18 percent. An error analysis revealed that accurate estimations occurred for larger catchments. At smaller catchments, R was overestimated in Laos where high infiltration capacity and sub-surface runoff occurred, and was underestimated in Thailand where eroded soils induced high surface runoffrates. The modelfor bedloadprediction showed a mean error (ME) of4.5 t ha1, which is weak considering a bedload standard deviation of5 t ha', Accurate estimations occurred for suspended load (SL). These results confirmed the ability ofprediction models to accurately estimate catchment outputs for runoffand partial sediment. These results also illustrate the real need to integrate erosion mechanisms acting at different spatial scales.

Infiltration (HVAC)

Wet season

WEPP

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