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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

Fallows improve soil fertility and allow sustainable agriculture. Soil fertility was assessed under different types of fallow through pH, nutrient concentrations and particulate organic matter (POM) quantity and quality. The two year-fallows were under Chromolaena odorata, Calliandra calothyrsus ...


Koutika, L.S.Hauser, S.Kamga, J.M.Yerima, B.[Comparative study of soil properties under Chromolaena odorata, Pueraria phaseoloides and Calliandra calothyrsus]Comparative study of soil properties under Chromolaena odorata, Pueraria phaseoloides and Calliandra calothyrsus

The Multi-purpose Tree (MPT) species have the ability to fit into the farming systems of the East African region where low agricultural productivity, widespread land degradation and hence a diminishing capacity to support the growing human and livestock population are major problems. GIS has been...


Conchedda, G.Berhe, KahsayJabbar, M.A.[A GIS-based analysis of the likelihood of adoption of some multi-purpose tree species in East Africa]A GIS-based analysis of the likelihood of adoption of some multi-purpose tree species in East Africa

A pot experiment was conducted to assess the fertiliser value of faeces from sheep fed with a diet supplemented with legumes free of or containing condensed tannins. Ten animals received the same five diets in different experimental runs of a double Latin Square design, all consisting of a low qu...


Tiemann, Tassilo T.Hincapié Carvajal, BelisarioFrossard, EmmanuelKreuzer, M.Hess, HD[Effect of supplementing tropical tannin-free and tanniniferous legumes to grass-fed sheep on the utility of their manure as nitrogen fertiliser]Effect of supplementing tropical tannin-free and tanniniferous legumes to grass-fed sheep on the utility of their manure as nitrogen fertiliser

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

An in vitro experiment was performed to compare the forage quality of foliage of Calliandra (Calliandra calothyrsus Meissner var. Patulul) cultivated on either low or medium-fertility soils in Colombia and Kenya, respectively. A grass-alone diet, with and without urea supplementation, and five le...


Hess, HDTiemann, Tassilo T.Noto, FFranzel, StevenLascano, Carlos E.Kreuzer, M.[The effects of cultivation site on forage quality of Calliandra calothyrsus var. Patulul]The effects of cultivation site on forage quality of Calliandra calothyrsus var. Patulul

Various combinations of a low-tannin herbaceous legume (Vigna unguiculata) and foliage of tanniniferous shrub legumes (Calliandra calothyrsus, Flemingia macrophylla and Leucaena leucocephala) or a low-tannin shrub legume (Cratylia argentea), all mixed together with a low-quality tropical grass (B...


Sturm, CDTiemann, Tassilo T.Lascano, Carlos E.Kreuzer, M.Hess, HD[Nutrient composition and in vitro ruminal fermentation of tropical legume mixtures with contrasting tannin contents]Nutrient composition and in vitro ruminal fermentation of tropical legume mixtures with contrasting tannin contents

Organic C inputs and their rate of stabilization influence C sequestration and nutrient cycling in soils. This study was undertaken to explore the influence of the combined application of different quality organic resources (ORs) with N fertilizers on the link between aggregate dynamics and soil ...


Chivenge, P.P.Vanlauwe, BernardGentile, RSix, Johan[Organic resource quality influences short-term aggregate dynamics and soil organic carbon and nitrogen accumulation]Organic resource quality influences short-term aggregate dynamics and soil organic carbon and nitrogen accumulation

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
Barrios, EdmundoCobo Borrero, Juan G.Rao, Idupulapati M.Thomas, Richard J.Amézquita Collazos, EdgarJiménez Jaén, Juan JoséRondón, Marco Antonio[Fallow management for soil fertility recovery in tropical Andean agroecosystems in Colombia]Fallow management for soil fertility recovery in tropical Andean agroecosystems in Colombia

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