Issue Date: Dec 15, 2010
SOIL constantly undergoes changes—be it by growing crops, adding fertilizer, erosion or contamination. Scientists analyse as many as 50 properties of soil—including sand and organic carbon content, porosity and essential nutrients like nitrogen and iron—to monitor its health and predict if the land is on the verge of degradation by soil erosion. Fertile land, for example, contains high amount of organic matter, nutrients and moisture, whereas eroded land fares poorly on the indicator scale.
Recent Supreme Court order in Vedanta case holds hope for tribal community life
Butterflies on the roof of the world is a vivid and engaging narrative of the author's rendezvous with the butterflies and moths in particular, and nature in general