Construction crews began placing the first layers of soil over the surface of the Wallis ... bridge of its kind in the world, and a global model for urban wildlife conservation, according to ...

However, in the 1990s, a growing number of farmers, including those in Lishu county, Jilin province, a major maize-producing county, found that the black soil was revealing yellow layers ...

They placed the first layers of soil on what will become a nearly 1-acre ... largest bridge of its kind in the world, and a global model for urban wildlife conservation, according to the National ...

Construction crews began placing the first layers of soil over the surface of the Wallis ... bridge of its kind in the world, and a global model for urban wildlife conservation, according to ...

ZHANG GUOJUN/XINHUA A revolutionary land management model is being ... process of black soil is extremely slow, requiring hundreds of years to form a 1-centimeter-thick layer under natural ...