Picture by Ragnar Sigurdsson / Artic Images.com. Soil banks show the former appearance of areas with dwindling vegetation and soil cover. Higher resolution images available from firstname.lastname@example.org (there is a licensing fee depending on the use). Imaggeo is the online open access geosciences image repository of the European Geosciences Union.
This is one of the pictures the year has left. In it, two Muslim militiamen armed with machetes are registering a Christian in the Miskine neighborhood, in Bangui (Central African Republic), December 13, 2013. About 1,600 and 3,000 French soldiers already there of the African MISCA international mission were not able to stop violence and chaos. Both in this case and in other armed conflicts, there ...[Read More]
Often, soils from cold regions, such as Arctic soils, show polygonal forms in their surface. These polygons are formed because of the freeze-thaw cycle, characteristic of permafrost. What is permafrost? Permafrost is a subsurface soil layer which stays permanently frozen (below 0 oC) during long periods of time, usually more than two consecutive years. Most extensive permafrost areas can be found ...[Read More]
Yesterday, I had to write the exam questions for my students of Soil Science in the Faculty of Biology. As there are many more than 300, because of the facilities that my government gives to the fulfilment of the Bologna Process and the European Higher Education Area (ironic mode activated), I usually make multiple choice tests (if you do the same, have a look at this). However, I like to put some ...[Read More]