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Geosoil permite almacenar, consultar e interpretar información tanto del suelo como de su entorno biofísico a diferentes escalas: parcela, finca, comunidad, municipio, departamento, región, país. Opera a partir de una base de datos relacional elaborada en ACCES 2000, compuesta por una serie de ta...


Rubiano Sanabria, YolandaAmézquita Collazos, EdgarBeaulieu, Nathalie[Sistema georreferenciado de indicadores de calidad de suelos para los Llanos Orientales de Colombia : Estudio de caso: Municipio de Puerto López, Meta]Sistema georreferenciado de indicadores de calidad de suelos para los Llanos Orientales de Colombia : Estudio de caso: Municipio de Puerto López, Meta

The vertical distribution of native earthworm species from natural and disturbed savannas in the Oxisols of the Colombian Llanos was assessed in a native savanna and in a 17-year-old grazed grass-legume pasture during a period of 17?months. Different patterns of vertical stratification were obser...


Jiménez Jaén, J.J.Decaëns, Thibaud[Vertical distribution of earthworms in grassland soils of the Colombian Llanos]Vertical distribution of earthworms in grassland soils of the Colombian Llanos

Se planteó un ensayo de campo para evaluar los efectos acumulados de la fertilización y la labranza en el cultivo de maíz y en pastos sin carga animal. Se evaluaron cambios en parámetros químicos y físicos del suelo en el primer centímetro de suelo de parcelas que se establecieron en 1995 en la f...


Galvis, JHAmézquita Collazos, EdgarMadero, E[Evaluación del efecto de la intensidad de labranza en la formación de costra superficial de un oxisol de sabana en los Llanos Orientales de Colombia : I. Caracterización química y textural en superficie = Evaluation of harrowing intensity on surface crusting on an oxisol of the eastern plains of Colombia: I. Chemical and textural characterization in soil surface]Evaluación del efecto de la intensidad de labranza en la formación de costra superficial de un oxisol de sabana en los Llanos Orientales de Colombia : I. Caracterización química y textural en superficie = Evaluation of harrowing intensity on surface crusting on an oxisol of the eastern plains of Colombia: I. Chemical and textural characterization in soil surface
Nziguheba, GeneroseTossah, B.K.Diels, J.Franke, A.C.Aihou, K.Iwuafor, E.N.O.Nwoke, CMerckx, R.[Assessment of nutrient deficiencies in maize in nutrient omission trials and long-term field experiments in the West African Savanna]Assessment of nutrient deficiencies in maize in nutrient omission trials and long-term field experiments in the West African Savanna

The relationship between trees, grass and soil in a dry savanna in Mali was investigated, to identify variables that are most relevant to assess vegetation units. A 65 ha plateau was inventoried using a systematic square grid sampling pattern. Thirteen soil or topography variables, and tree and g...


Picard, N.Gueguen, K.Abdoulaye, H.A.Diarisso, D.Karembe, M.Birnbaum, P.Nasi, Robert[Tree formations in relation with soil and grasses in a dry savanna in Mali, West Africa]Tree formations in relation with soil and grasses in a dry savanna in Mali, West Africa

Le bois énergie et le charbon de bois couvrent une bonne partie des besoins en énergie domestique dans les pays du Sahel : 92% au Burkina, 86% au Mali, 80% au Niger, 47% au Sénégal, 96% au Tchad, selon une étude de la Fao (1986). Les formations arborées (principalement des savanes) sont, de fait,...


Picard, N.Ballo, M.Dembele, F.Gautier, D.Kaire, M.Karembe, M.Mahamane, A.Manlay, R.Ngom, D.Ntoupka, M.Ouattara, S.Savadogo, P.Sawadogo, L.Seghieri, J.Tiveau, D.[Evaluation de la productivite et de la biomasse des savanes seches africaines: l’apport du collectif savator]Evaluation de la productivite et de la biomasse des savanes seches africaines: l’apport du collectif savator

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

In tropical savannas where soils are generally sandy and nutrient poor, organic farming associated with enhanced soil biological activity may result in increased nutrient availability. Therefore, legumes have been introduced in the humid savanna zone of Côte d’Ivoire, owing to their ability to fi...


Kone, AWEdoukou, Ettien F.Tondoh, Jérôme E.Gonnety, JTAngui, Pascal K.T.Masse, D[Comparative study of earthworm communities, microbial biomass, and plant nutrient availability under 1-year Cajanus cajan (L.) Millsp and Lablab purpureus (L.) Sweet cultivations versus natural regrowths in a guinea savanna zone]Comparative study of earthworm communities, microbial biomass, and plant nutrient availability under 1-year Cajanus cajan (L.) Millsp and Lablab purpureus (L.) Sweet cultivations versus natural regrowths in a guinea savanna zone
Pantoja López, AGarcía, C.Mejía, OL[Flight activity of Spodoptera fugiperda (J.E. Smith) in acid savanna ricefields in northeastern Colombia]Flight activity of Spodoptera fugiperda (J.E. Smith) in acid savanna ricefields in northeastern Colombia

The soil organic carbon (SOC) dynamic is a key element of soil fertility in savannah ecosystems that form the key agricultural lands in sub-Saharan Africa. In the western part of Burkina Faso, the land use is mostly linked to cotton-based cropping systems. Use of mechanization, pesticides, and he...


Ouattara, BOuattara, K.Serpantie, G.Mando, ASedogo, MPBationo, B. André[Intensity cultivation induced effect on soil organic carbon dynamic in the western cotton area of Burkuna Faso]Intensity cultivation induced effect on soil organic carbon dynamic in the western cotton area of Burkuna Faso

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