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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

Variations in the natural 13C abundance of soil organic matter (SOM) at different depths combined with SOM radiocarbon dating were used to reconstruct the history of the forest-savanna successions over the last millennium in the Gabon coastal area. A chronosequence was established by comparing th...


Delegue, M.A.Fuhr, M.Schwartz, A.M.Nasi, Robert[Recent origin of most of the forest cover in the Gabon coastal area]Recent origin of most of the forest cover in the Gabon coastal area

A new arbuscular mycorrhizal fungus was isolated from the Southern Guinea savanna in Benin, which represents a tree-rich savanna in the transi-tion between the tropical atlantic rainforests and grass-rich savannas in sub-Saharan West Africa. The fungus was propagated in bait cultures and monospor...


Oehl, F.Tchabi, A.Silva, G.A.Sánchez Castro, I.Palenzuela, J.Monte Junior, I.P. doLawouin, L.Coyne, D.L.Hountondji, F.C.C.[Acaulospora spinosissima, a new arbuscular mycorrhizal fungus from the Southern Guinea Savanna in Benin]Acaulospora spinosissima, a new arbuscular mycorrhizal fungus from the Southern Guinea Savanna in Benin

Attention is being paid to improving the N2 fixation of promiscuous nodulating soybeans in an attempt to develop sustainable cropping systems in the moist savanna. There is however a dearth of reliable estimates of N2 fixation by these promiscuous soybeans and hardly any quantitative information ...


Sanginga, N.Dashiell, Kenton E.Okogun, J.A.Thottappilly, G.[Nitrogen fixation and N contribution by promiscuous nodulating soybeans in the southern Guinea savanna of Nigeria]Nitrogen fixation and N contribution by promiscuous nodulating soybeans in the southern Guinea savanna of Nigeria

The Guinea savannas of Nigeria have a high potential for the production of maize because of favourable environmental conditions. Despite this high potential, the yields obtained in farmers' fields are still very low. This is due to soil degradation and nutrient depletion arising from intensificat...


Kamara, A.Menkir, A.Ajala, S.O.Kureh, I.[Performance of diverse maize genotypes under nitrogen deficiency stress in the northern Guinea Savanna of Nigeria]Performance of diverse maize genotypes under nitrogen deficiency stress in the northern Guinea Savanna of Nigeria

In the Brazilian savanna, there is a risk that soil fertility of pastures declines to a level below that of the native savanna because of low fertilizer application. To evaluate biophysical pasture sustainability we compared regularly fertilized productive pasture (PP), degraded pasture fertilize...


Lilienfein, JWilcke, W.Vilela, LAyarza, Miguel AngelCarmo Lima, S. doZech, W.[Soil fertility under native cerrado and pasture in the Brazilian savanna]Soil fertility under native cerrado and pasture in the Brazilian savanna

A study was carried out in the Sudan savanna zone in the Upper East Region of Ghana to assess the rate of sediment-bound nutrient export (NE) into five small reservoirs (Dua, Doba, Zebilla, Kumpalgogo and Bugri) and to analyse the implications of this export. The catchment soils and reservoir sed...


Amegashie, BKQuansah, CAgyare, W.A.Tamene, LulsegedVlek, Paul L.G.[Sediment-bound nutrient export from five small reservoir catchments and its implications for the Sudan savanna zone of Ghana]Sediment-bound nutrient export from five small reservoir catchments and its implications for the Sudan savanna zone of Ghana

There are several indications that legumes are capable of accessing sparingly soluble phosphorus (P) in the soil through root-induced processes. We hypothesize that this plant-induced mobilization of P can be demonstrated if the plant accessible P assessed by isotopic dilution ( L-value ) exceeds...


Pypers, PieterLoon, L. vanDiels, J.Abaidoo, R.C.Smolders, EMerckx, R.[Plant-available P for maize and cowpea in P-deficient soils from the Nigerian Northern Guinea savanna : Comparison of E- and L-values]Plant-available P for maize and cowpea in P-deficient soils from the Nigerian Northern Guinea savanna : Comparison of E- and L-values

The objective of this study was to estimate the results of the upland rice (Oryza sativa L.) breeding program conducted by the Brazilian Agricultural Research Corporation (Embrapa) and collaborators over the period of 1984 to 2009 covering 25 annual steps of improvement. The best lines generated ...


Breseghello, FlávioPeixoto de Morais, OValle Pinheiro, PSimoes Silva, CMaia de Castro, E. daGuimaraes, Elcio PerpétuoPereira de Castro, APereira, JAMatos Lopes, A. deUtumi, MMPereira de Oliveira, J[Results of 25 years of upland rice breeding in Brazil]Results of 25 years of upland rice breeding in Brazil

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