Isbn: 9787806215531 - yellow river soil and water conservation ecological project construction management [paperback] (1 risultati)

paperback. Condizione: New. Paperback. Pub Date: 2002 Jun Pages: 289 in Publisher: Yellow River basin of the Yellow River Conservancy Press is our most serious soil erosion areas. Especially in the Loess Plateau. the area of ??soil erosion. or loss of strength. are any other region in the world do not have. Soil erosion area accounted for 70.9% of the land area. the average years enter the lower reaches of the Yellow River sediment is about 1.6 billion tons. Resulting in the Loess Plateau fragmented terrain and fragile .…