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The role of livestock in nitrogen cycling in mixed crop-livestock farming systems of sub-Saharan Africa was explored. Cattle were fed a range of diets to investigate the effects on partitioning of nitrogen between urine and faeces and on the chemical composition of the manures produced. The trade...


Delve, Robert J.Cadisch, GeorgTanner, J.C.Thorpe, W.R.Thorne, Peter J.Giller, Ken E.[Implications of livestock feeding management on soil fertility in the smallholder farming systems of sub-Saharan Africa]Implications of livestock feeding management on soil fertility in the smallholder farming systems of sub-Saharan Africa

In the tropics, numerous organizations have promoted multipurpose fodder trees (MPFT) with an emphasis on exotic species. These species have generally been selected and recommended by the research system through the conventional nutritional and agronomic experimentation for use as animal feed and...


Mekoya, A.Oosting, Simon J.Fernández Rivera, S.Zijpp, A.J. van der[Multipurpose fodder trees in the Ethiopian highlands: Farmers' preference and relationship of indigenous knowledge of feed value with laboratory indicators]Multipurpose fodder trees in the Ethiopian highlands: Farmers' preference and relationship of indigenous knowledge of feed value with laboratory indicators

Concentrate feeds have become an important feature of dairy cattle diets on small-scale farms in the Central Kenya Highlands. Excreta derived from such diets can be of high quality if nutrient losses are minimized. Steers were fed a basal diet of Napier grass supplemented with either commercial d...


Lekasi, J.K.Tanner, J.C.Kimani, S.K.Harris, P.J.C.[Effects of poultry litter amended steer diets and subsequent manure collecting systems on nutrient recovery in composted manures]Effects of poultry litter amended steer diets and subsequent manure collecting systems on nutrient recovery in composted manures

To assess the efficiency of seven treatments including biochars produced from dried faecal matter and manures as stabilizing agents of cadmium (Cd)-spiked soils, lettuce was grown in glasshouse on two contrasting soils. The soils used were moderately fertile silty loam and less fertile sandy loam...


Woldetsadik, D.Drechsel, PayKeraita, Bernard N.Marschner, B.Itanna, F.Gebrekidan, H.[Effects of biochar and alkaline amendments on cadmium immobilization, selected nutrient and cadmium concentrations of lettuce (Lactuca sativa) in two contrasting soils]Effects of biochar and alkaline amendments on cadmium immobilization, selected nutrient and cadmium concentrations of lettuce (Lactuca sativa) in two contrasting soils

Root turnover may contribute a significant proportion of recycled nutrients in agroforestry systems and competition between trees and crops for nutrients and water may depend on temporal fine root regrowth patterns. Fine root biomass (? 2 mm) and fine root productivity were measured during one ye...


Muñoz Arboleda, FernandoBeer, JW[Fine root dynamics of shaded cacao plantations in Costa Rica]Fine root dynamics of shaded cacao plantations in Costa Rica

In a short-term improved fallow for crop-livestock farming systems of subhumid west Africa, rotational effects from a range of forage legumes on a subsequent maize crop were studied at two sites in south-west Nigeria. Nutrient (nitrogen, phosphorus and potassium) export from the fallows in the fo...


Muhr, LTarawali, Shirley A.Peters, MichaelSchultze-Kraft, Rainer[Forage legumes for improved fallows in agropastoral systems of subhumid West Africa. III. Nutrient import and export by forage legumes and their rotational effects on subsequent maize]Forage legumes for improved fallows in agropastoral systems of subhumid West Africa. III. Nutrient import and export by forage legumes and their rotational effects on subsequent maize

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

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

Soil degradation is one of the most serious threats to sustainable crop production in many tropical agroecosystems where extensification rather than intensification of agriculture has occurred. In the highlands of western Kenya, we investigated soil nitrogen (N) and phosphorus (P) constraints to ...


Ngoze, S.Riha, S.Lehmann, JohannesKinyangi, JamesVerchot, Louis V.Mbugua, D.Pell, A.[Nutrient constraints to tropical agroecosystem productivity in long-term degrading soils]Nutrient constraints to tropical agroecosystem productivity in long-term degrading soils

Although wastewater has been increasingly used to grow a range of crops for income generation and livelihood resilience in urban and peri-urban areas, irrigation with untreated or partially treated wastewater may result in negative impacts on irrigated crops, soils, and groundwater along with imp...


Qadir, ManzoorDrechsel, Pay[Contaminant management in water reuse systems]Contaminant management in water reuse systems

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