Before revision: Soil Erosion Urban sprawl in California Soil erosion in Madagascar Lal and Stewart estimated global loss of agricultural land by degradation and abandonment at 12 million hectares per year.Lal, R. and B.
After revision: Agricultural land loss Urban sprawl in California Soil erosion in Madagascar Lal and Stewart estimated global loss of agricultural land by degradation and abandonment at 12 million hectares per year.Lal, R. and B.