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The Boran cattle, indigenous to southern Ethiopia, at one time formed the basis of a thriving slaughter stock trade between Ethiopia and East Africa. Ranchers in Kenya buying these cattle as they moved down to urban centers for slaughter found that they were more productive under the adverse envi...
Heat tolerance of West African Dwarf Shorthorn and N'Dama cattle in Ghana are investigated. Data on the magnitude and direction of the heat tolerance coefficients (HTC), the nature of the HTC variation by the mean, standard deviation and coefficient of variation included. Hightlights some of the ...
Factors influencing reproductive performance of Angoni, Barotse, and Boran under ranching conditions are examined. Five years reproduction records of 675 Angoni, 731 Barotse and 815 Boran were analysed. Calving percentages were 82.5, 78.1 and 75.4 for Angoni, Barotse and Boran, respectively. Year...
Human action has modified the earth in many ways, but one of the most pervasive effects of humans on the environment is dissection of natural systems into spatially isolated parts, a process generally known as fragmentation. Fragmentation of environments is not only caused by humans; dynamic natu...
Report of the CGIAR covering the year 1992. It contains an introduction by CGIAR Executive Secretary Alexander von der Osten, and an overview of the eighteen CGIAR centers. Discussion of the events of 1992 concentrates on centers not addressed in 1991. The chapter notes a serious contraction in o...
A randomised complete block experiment was conducted in the 1998 and 1999 cropping seasons in five major yam growing areas in the yam belt of Nigeria to evaluate the performance and yield stability of six genotypes of water yarn (Dioscorea alata L). Location, genotype and their interaction effect...
In this paper, we investigate similarities of effects of soil environmental drivers on year-round daily soil fluxes of nitrous oxide and methane for three distinct semi-natural or natural ecosystems: temperate spruce forest, Germany; tropical rain forest, Queensland, Australia; and ungrazed semi-...
We present a new model system, which facilitates scaling of ecosystem processes from the site to regional simulation domains. The new framework LandscapeDNDC partly based on the biogeochemical site scale model DNDC—inherits a series of new features with regard to process descriptions, model struc...
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