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Earthworms are generally considered to fulfill the definition of ecosystem engineers. The casts they produce are recognised to have a great importance in the regulation of soil processes. Lifetimes and degradation rates of these structures remain poorly known. In this study, the dynamics of disap...


Decaëns, Thibaud[Degradation dynamics of surface earthworms casts in grasslands of the Eastern plains of Colombia]Degradation dynamics of surface earthworms casts in grasslands of the Eastern plains of Colombia
Herrera, P.Ayarza, Miguel AngelRao, Idupulapati M.Amézquita Collazos, Edgar[Efecto de las pasturas mejoradas y de su rotación con cultivos de arroz, sobre algunas de las propiedades físicas de un suelo de la altillanura colombiana]Efecto de las pasturas mejoradas y de su rotación con cultivos de arroz, sobre algunas de las propiedades físicas de un suelo de la altillanura colombiana
Rao, Idupulapati M.Cramer, Grant M.[Plant nutrition and crop improvement in adverse soil conditions]Plant nutrition and crop improvement in adverse soil conditions
Singh, Bal RamRao, Idupulapati M.Barrios, EdmundoAmézquita Collazos, Edgar[Potential of tillage, agropastoral, and planted fallow systems in low-fertility tropical soils in Latin America]Potential of tillage, agropastoral, and planted fallow systems in low-fertility tropical soils in Latin America

An on farm tiral, in which a wheat-clover mixed cropping treatment was compared to an unfertilized (control) and N-fertilized (23 kg N ha-1) pure wheat treatments, was conducted at Ginchi (2200 metres above sea level (masl) and Deneba (2600 masl) in the Ethiopian highlands. The total crop residue...


Tedla, A.Lupwayi, N.Z.Regassa, H.[Cereal-forage legume mixed cropping systems in the Ethiopian highlands]Cereal-forage legume mixed cropping systems in the Ethiopian highlands

Maize was planted at two, three or four seeds per hole with uniform spacing and either the smallest plant (S) or the second largest plant (L) was thinned from each hole after 8 and 14 weeks from the four seed plots and after 14 weeks for the three seed plots. Two plants per hole were left to matu...


Methu, J.N.Owen, E.Tanner, J.C.Abate, A.L.[The effect of increasing planting density and thinning on forage and grain yield of maize in Kenyan smallholdings]The effect of increasing planting density and thinning on forage and grain yield of maize in Kenyan smallholdings

The impact of grazing on physical properties of Vertisol was studied from 1996 to 2000 in the Ethiopian highlands. The study was conducted at 2 sites with 0-4 and 4-8% slopes at Tero Jemjem watershed in Ginchi, 80 km west of Addis Ababa. The objective of the study was to compare selected soil phy...


Taddese, G.Mohamed Saleem, M.A.Ayaleneh, W.[Effect of livestock grazing on physical properties of a cracking and self-mulching Vertisol]Effect of livestock grazing on physical properties of a cracking and self-mulching Vertisol

Pot trials and laboratory phosphorus (P) sorption studies were conducted to evaluate the response of seven Ethiopian clover species (T. decorum, T. steudneri, T. quartinianum, T. rueppellianum, T. schimperi, T. tembense, and T. subterraneum) to applied P and further to determine the critical exte...


Nnadi, L.A.Haque, I.Mugwira, L.M.[Phosphorus response and mineral composition of Ethiopian highland Trifolium (clover) species]Phosphorus response and mineral composition of Ethiopian highland Trifolium (clover) species

Para determinar cómo influye la intensidad de la boreo en un Oxisol de la Altillanura sobre las propie dades físicas del suelo relacionadas con el movimiento del agua y relacionar éstas con el almacenamiento y agotamiento de la misma en el suelo a través del balan ce hídrico, se seleccionó un sue...


Valenzuela, IGPerea, GAmézquita Collazos, EdgarGarcía, A.[Régimen de humedad de un suelo de la altillanura cultivado con arroz de secano bajo diferentes intensidades de laboreo]Régimen de humedad de un suelo de la altillanura cultivado con arroz de secano bajo diferentes intensidades de laboreo

En el Ecoparque Cerro de la Bandera, zona dedicada muchos años a la explotación carbonífera, se evaluó el efecto de dicha práctica sobre propiedades fisicoquímicas y flora microbiana de sus suelos. En tres zonas, bosque nativo (BP); zona intervenida en proceso de regeneración (BS); Zona erosionad...


Zapata, CFSánchez de Prager, MarinaAzakawa, NM[Indicadores de actividad biológica en suelos con diferentes grados de intervención en el Ecoparque Cerro de la Bandera]Indicadores de actividad biológica en suelos con diferentes grados de intervención en el Ecoparque Cerro de la Bandera

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