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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

Barrios, E.Coutinho, Heitor L.C.Medeiros, CAB[InPaC-S: participatory knowledge integration on indicators of soil quality: methodological guide]InPaC-S: participatory knowledge integration on indicators of soil quality: methodological guide

The knowledge and principles generated by CPWF-PN15 confirm that QSMAS can be a model production system for implementing conservation agriculture to achieve food security and sustainable development in drought-prone areas of hillsides in the sub-humid tropics, while providing ecosystem services i...


Castro, A.Rivera, M.Ferreira, OscarPavon, J.García, E.Amézquita Collazos, EdgarAyarza, Miguel AngelBarrios, E.Rondón, Marco AntonioPauli, N.Baltodano, Maria EugeniaMendoza, B.Welchez, L.A.Rao, Idupulapati M.[Quesungual slash and mulch agroforestry system (QSMAS): Improving crop water productivity, food security and resource quality in the sub-humid tropics]Quesungual slash and mulch agroforestry system (QSMAS): Improving crop water productivity, food security and resource quality in the sub-humid tropics
Vanlauwe, BernardBarrios, E.Robinson, Timothy P.Asten, Piet J.A. vanZingore, ShamieGerard, Bruno G.[System productivity and natural resource integrity in smallholder farming: Friends or foes?]System productivity and natural resource integrity in smallholder farming: Friends or foes?

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

Welchez, L.A.Ayarza, Miguel AngelAmézquita Collazos, EdgarBarrios, E.Rondón, Marco AntonioRao, Idupulapati M.Rivera, M.Pavon, J.Ferreira, OscarValladares, D.Sánchez, N.Castro, A.[Unraveling the mysteries of the Quesungual slash and mulch agroforestry system]Unraveling the mysteries of the Quesungual slash and mulch agroforestry system

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