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Leaves of nine green manure (GM) species were surface applied to a tropical volcanic-ash soil at a rate of 100 kg N ha 1 in order to evaluate their N-fertilizer value in a glasshouse experiment. GM treatments were compared to urea at two rates, 50 kg N ha 1 (FN50) and 100 kg N ha 1 (FN100), and t...


Cobo Borrero, Juan G.Barrios, E.Kass, DCLThomas, Richard J.[Nitrogen mineralization and crop uptake from surface-applied leaves of green manure species on a tropical volcanic-ash soil]Nitrogen mineralization and crop uptake from surface-applied leaves of green manure species on a tropical volcanic-ash soil

Planted tree or shrub fallows can help increase the fertility of degraded tropical soils. We investigated the effects of planted fallows of Indigofera (IND), Calliandra (CAL), and Tithonia (TTH); a natural, unmanaged fallow (NAT); and a maize/bean rotation (ROT) on the dynamics and partitioning o...


Phiri, SBarrios, E.Rao, Idupulapati M.Singh, B.R.[Changes in soil organic matter and phosphorus fractions under planted fallows and a crop rotation system on a Colombian volcanic-ash soil]Changes in soil organic matter and phosphorus fractions under planted fallows and a crop rotation system on a Colombian volcanic-ash soil
Fonte, Steven J.Barrios, E.Six, Johan[Earthworm impacts on soil organic matter and fertilizer dynamics in tropical hillside agroecosystems of Honduras]Earthworm impacts on soil organic matter and fertilizer dynamics in tropical hillside agroecosystems of Honduras

Legume tissue quality is a key factor for enhancement of feed resources and contribution to soil fertility in mixed crop-livestock production systems. To compare methods used by soil scientists and animal-nutritionists to assess quality of plant materials, three woody tropical legumes with contra...


Tscherning, KBarrios, E.Lascano, Carlos E.Peters, MichaelSchultze-Kraft, Rainer[Effects of sample post harvest treatment on aerobic decomposition and anaerobic in-vitro digestion of tropical legumes with contracting quality]Effects of sample post harvest treatment on aerobic decomposition and anaerobic in-vitro digestion of tropical legumes with contracting quality

The decomposition and nutrient release of 12 plant materials were assessed in a 20-week litterbag field study in hillsides from Cauca, Colombia. Leaves of Tithonia diversifolia (TTH) and Indigofera constricta (IND) decomposed quickly (k=0.035±0.002 d?1), while those of Cratylia argentea (CRA) and...


Cobo Borrero, Juan G.Barrios, E.Kass, DCLThomas, Richard J.[Decomposition and nutrient release by green manures in a tropical hillside agroecosystem]Decomposition and nutrient release by green manures in a tropical hillside agroecosystem

Pyrogenic carbon (PyC) is important because of its role in the global organic C (OC) cycle and in modifying soil properties. However, our understanding of PyC movement from terrestrial to fluvial ecosystems is not robust. This study examined (i)whether erosion or subsurface transport wasmore impo...


Guerena DTLehmann JWalter TEnders ANeufeldt, HenryOdiwuor HBiwott HRecha, John W.M.Shepherd KBarrios, E.Wurster C[Terrestrial pyrogenic carbon export to fluvial ecosystems: lessons learned from the White Nile watershed of East Africa]Terrestrial pyrogenic carbon export to fluvial ecosystems: lessons learned from the White Nile watershed of East Africa

Quantification of the spatial and temporal distribution patterns of soil fauna is a relatively new area of research, and has been proposed as the key to understanding the high diversity typical of soil fauna communities. Field research on the relationships among the spatial distribution patterns ...


Pauli, N.Oberthür, ThomasBarrios, E.Conacher, A.[Fine-scale spatial and temporal variation in earth worm surface casting activity in agroforestry fields, western Honduras]Fine-scale spatial and temporal variation in earth worm surface casting activity in agroforestry fields, western Honduras

Smallholder agroforestry systems often incorporate features that are associated with abundant, diverse soil macrofauna populations. This study sampled soil macrofauna communities across four major land uses present within agricultural landscapes where the Quesungual Slash-and-Mulch Agroforestry S...


Pauli, N.Barrios, E.Conacher, A.J.Oberthür, Thomas[Soil macrofauna in agricultural landscapes dominated by the Quesungual Slash-and-Mulch agroforestry system, western Honduras]Soil macrofauna in agricultural landscapes dominated by the Quesungual Slash-and-Mulch agroforestry system, western Honduras

Fourteen strains were isolated from nitrogen-fixing nodules on the roots of plants of the genus Mimosa growing in Taiwan, Brazil and Venezuela. On the basis of 16S rRNA gene sequence similarities, all of the strains were previously shown to be closely related to each other and to belong to the ge...


Chen, W.M.James, EKCoenye, T.Chou, JHBarrios, E.Faria, S.M. deElliott, GNSheu, SYSprent, JIVandamme, P[Burkholderia mimosarum sp. nov., isolated from root nodules of Mimosa spp. from Taiwan and South America]Burkholderia mimosarum sp. nov., isolated from root nodules of Mimosa spp. from Taiwan and South America

Planted fallow systems under slash and mulch management were compared with natural fallow systems at two farms (BM1 and BM2) in the Colombian Andes. The BM1 site was relatively more fertile than the BM2 site. Planted fallow systems evaluated included Calliandra calothyrsus CIAT 20400 (CAL), Ind...


Barrios, E.Cobo Borrero, Juan G.[Plant growth, biomass production and nutrient accumulation by slash/mulch agroforestry systems in tropical hillsides of Colombia]Plant growth, biomass production and nutrient accumulation by slash/mulch agroforestry systems in tropical hillsides of Colombia

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