Eucalyptus: The Popular Exotic Tree Crop in Ethiopia

Eucalyptus oil and tea tree oil.

Dear Sir, We read the excellent short review article of Higgins et al. (1) on contact allergy to and the safety of eucalyptus oil with great interest. Having recently finished writing a full literature review of contact allergy to and the chemical composition of essential oils (2), we would like to give some additional information on eucalyptus oil. Also, we will address the question raised by ...

Indigenous Woody Species Regeneration under the Canopies of Exotic Tree Plantations at Tore Forest, Gelana District, Southern Oromia, Ethiopia

Ethiopia has one of the longest forest plantation histories in Africa. Forest plantations in Ethiopia are mainly monocultures of exotic species, such as Eucalyptus globulus, Eucalyptus camaldulensis, Cupressus lusitanica, Casuarina cunninghamiana, Pinus patula, Pinus radiata, and the native species Juniperus procera. Accordingly, in the end of the 19th century Eucalyptus species were introduced...

Efficient Computation of Popular Phylogenetic Tree Measures

Given a phylogenetic tree T of n nodes, and a sample R of its tips (leaf nodes) a very common problem in ecological and evolutionary research is to evaluate a distance measure for the elements in R. Two of the most common measures of this kind are the Mean Pairwise Distance (MPD) and the Phylogenetic Diversity (PD). In many applications, it is often necessary to compute the expectation and stan...

The multi-purpose Moringa tree: Ethiopia

Impact of Climate Variability on Cool Weather Crop Yield in Ethiopia

The research examined effect of climate variability on yield of the two dominant cool weather cereals (wheat and barley) in central highland and Arssi grain plough farming systems of Ethiopia using eight round unbalanced panel data (1994-2014). The stochastic frontier model result revealed that production inputs for producing wheat and barley in the two farming system had significant effect. Cr...