...So01 Finger test to examine the quality of soil
So02 Water content and density of different soil samples
So03 Dried up soil: Does it contain water?
So04 How much air is in the soil sample of So3?
.So05 Soil may contain acids or their opponents
So06 Salts are dissolved in soil
So07 Soils as environment of animals
So08 Potatoes and fungi grow in the soil
So09 Red soil contains iron compounds
So10 Lime soil 1: Limestone mining and processing
So11 Lime soil 2: Baobab Farm, recultivation of a former limestone quarry
So12 Aquaculture: Plants may grow without soil

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back....... ...........first published: 20.12.2001.............last modification: 10.10.2008