The difference between rich and nutrient-poor soil

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WHAT IS SOIL? Soils are complex mixtures of minerals, water, air, organic matter, and countless organisms that are the decaying remains of once-living things. It forms at the surface of land – it is the “skin of the earth.” Soil is capable of supporting plant life and is vital to life on earth. Soil, as formally defined in the Soil Science Society of America Glossary of Soil Science Terms, is: The unconsolidated mineral or organic material on the immediate surface of the earth that serves as a natural medium for the growth of land plants. The unconsolidated mineral or organic matter on the surface of the earth that has been subjected to and shows effects of genetic and environmental factors of: climate (including water and temperature effects), and macro- and microorganisms, conditioned by relief, acting on parent material over a period of time. So then, what is dirt? Dirt is what gets on our clothes or under our fingernails. It is soil that is out of place in our world...
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Soils in regions of Andean Arid Climate

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Soils in regions of Andean Arid Climate    In July, I made a trip to Bolivia and Peru, and I came across totally adverse and unusual landscapes and weather. The dry climate at this time of year and the altitude transforms the landscape into a beautiful desert surrounded by mountains with snowy peaks.                                   (Mariana Franco de Carvalho 07/2012) But what interests us here is to observe one aspect of the Andean landscape, which immediately catches our eye, the desert soil. As a didactic example, I will take as an example, the city of Arequipa in Peru. Arequipa is located at the foot of the Misti volcano (with more than 5800 m of altitude) its urban site is close to the Coastal Desert of Peru, with maximum annual temperature not exceeding 23ºC and minimum low temperature of ...
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