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Sustainable land use in periodically dry Brazilian savannas requires a water-saving management. We hypothesized that the annual course of matric potentials (?M) in very-fine, isohyperthermic Anionic Acrustoxes of Pinus plantations (PI), degraded (DP) and productive pastures (PP), no-till (NT) and...


Lilienfein, JWilcke, W.Ayarza, Miguel AngelLima, SCVilela, LZech, W.[Annual course of matric potential in differently used savanna oxisols in Brazil]Annual course of matric potential in differently used savanna oxisols in Brazil

The effects of a large species of anecic earthworm, Martiodrilus carimaguensis Jiménez and Moreno, on soil C and N dynamics were investigated in a native savanna and a man-made pasture of the eastern plains of Colombia. We compared, across time (11 months), the total C, total N, NH+ 4 and NO– 3 c...


Decaëns, ThibaudRangel Becerra, AFAsakawa, N.Thomas, Richard J.[Carbon and nitrogen dynamics in ageing earthworm casts in grasslands of the eastern plains of Colombia]Carbon and nitrogen dynamics in ageing earthworm casts in grasslands of the eastern plains of Colombia

The role of residue characteristics in enhancing the availability of P was investigated in a greenhouse study using two soils from the northern Guinea savanna (NGS) and four from the derived savanna (DS) zones of the West African moist savanna. Eight organic residues of varying C-to-P ratio were ...


Nwoke, O.C.Vanlauwe, BernardDiels, J.Sanginga, NteranyaOsonubi, O.[Impact of residue characteristics on phosphorus availability in West African moist savanna soils]Impact of residue characteristics on phosphorus availability in West African moist savanna soils

The savanna-woodlands of West Africa have been subject to disturbance by fire, grazing and tree cutting for centuries. Often the disturbance is severe, for instance when a thick patch of 4 m tall perennial grass catches fire late in the dry season or man decides to clear-cut an area. Fortunately ...


Savadogo, P.Tiveau, D.Sawadogo, L.Zida, D.Dayamba, Sidzabda Djibril[Resilience of Sudanian: savanna-woodlands in Burkina Faso]Resilience of Sudanian: savanna-woodlands in Burkina Faso

Fire, grazing, browsing and tree cutting are major anthropogenic determinants of vegetation patterns in African savannas. In Burkina Faso forest management policies prohibit grazing while recommending annual early fire and selective tree cutting of 50% of the merchantable standing volume on a 20-...


Zida, D.Sawadogo, L.Tigabu, M.Tiveau, D.Oden, P.C.[Dynamics of sapling population in savanna woodlands of Burkina Faso subjected to grazing, early fire and selective tree cutting for a decade]Dynamics of sapling population in savanna woodlands of Burkina Faso subjected to grazing, early fire and selective tree cutting for a decade

Wildfire is a major disturbance in Baikiaea plurijuga Harms woodland savannas. We tested the hypothesis that the timing and intensity of herbivory influence fuel loads. We used three stocking rates namely light (three cows and four goats ha)1), medium (six cows and eight goats ha)1) and heavy (e...


Gambiza, J.Campbell, Bruce M.Moe, S.R.Mapaure, I.[Season of grazing and stocking rate interactively affect fuel loads in a Baikiaea plurijuga Harms woodland in northwestern Zimbabwe]Season of grazing and stocking rate interactively affect fuel loads in a Baikiaea plurijuga Harms woodland in northwestern Zimbabwe

Oxisols such as those of the Colombian Eastern Plains (Llanos) are susceptible to physical, chemical and biological degradation once brought into cultivation, especially under intensive use of machinery. The main objective of this study was to determine the impact of intensive disc harrowing (2, ...


Phiri, SAmézquita Collazos, EdgarRao, Idupulapati M.Singh, B.R.[Disc harrowing intensity and its impact on soil properties and plant growth of agropastoral systems in the Llanos of Colombia]Disc harrowing intensity and its impact on soil properties and plant growth of agropastoral systems in the Llanos of Colombia

Agriculture in the dry savannas is intensifying in response to increasing populations of humans and livestock. As a result, increased productivity demands are placed upon integrated crop-livestock systems and more emphasis is on the roles of legumes such as cowpea. Cowpea has the potential to fun...


Tarawali, Shirley A.Singh, B.B.Gupta, S.C.Tabo, RamadjitaHarris, F.Nokoe, S.Fernández Rivera, S.Bationo, B. AndréManyong, Victor M.Makinde, K.Odion, E.C.[Cowpea as a key factor for a new approach to integrated crop-livestock systems research in the dry savannas of West Africa]Cowpea as a key factor for a new approach to integrated crop-livestock systems research in the dry savannas of West Africa

Biological factors of fertility were assessed through the study of litter quantity and quality, soil organic matter quantity and quality, soil microfauna, soil macrofauna, organic matter dynamic, particularly decomposition and non-symbiotic nitrogen fixation in an age series of Eucalyptus PF1 and...


Bernhard-Reversat, F.Laclau, J.P.Loubana, P.M.Loumeto, J.J.Mboukou, I.M.C.Reversat, G.[Changes in biological factors of fertility in managed Eucalyptus plantations on a savanna soil in Congo]Changes in biological factors of fertility in managed Eucalyptus plantations on a savanna soil in Congo

In the southern coastal region of Congo near Pointe-Noire, savanna covers large areas on very poor sandy soils. These savannas have been used since 1978 for plantations of fast growing trees, mainly eucalypts, which are grown commercially. A particular feature of the Congolese plantations was the...


Bernhard-Reversat, F.[Effect of exotic tree plantations on plant diversity and biological soil fertility in the Congo savanna: with special reference to eucalypts]Effect of exotic tree plantations on plant diversity and biological soil fertility in the Congo savanna: with special reference to eucalypts

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