Harvesters collect rice from black soil paddy fields at a farm in Huachuan, Heilongjiang province, in October. ZHANG GUOJUN/XINHUA A revolutionary land management model is being applied across the ...

SUN ZIFA/CHINA NEWS SERVICE These four models are collectively referred to as the Longjiang Model, which has effectively addressed the issue of black soil degradation across the province.

Developing methods for constructing roads on expansive soil by using soil additives derived from local plants Many parts of Ethiopia remain hardly accessible due to a lack of well-maintained rural ...