It was long a poor farming region until the 19th century, when modern farming methods improved the productivity of its cropland.
If the grassland becomes degraded or is converted to cropland, it loses some of its capacity to store this carbon (FAO 2006; WB, 2009).
It is situated in cropland and will have a runway that is more than 1,000 metres longer than the old airport, which should reduce the problem of over-runs which have been a major cause of accidents.
It suggests that the cropland conservation policy in China effectively protected the total cropland area in overall, but the consequences in terms of fragmentation might be underestimated.
That manure is frequently over-applied to cropland, where it all too often flows into nearby rivers and streams.
Brazil, China, and India were considered among the overseas locations where land use change would occur as a result of diverting U.S. corn cropland, and it was assumed that new cropland in each of these regions correspond to different types of forest, savanna or grassland based on the historical proportion of each converted to cultivation in these countries during the 1990s.
By comparison, the statistical interpretation of the underlying data points, by means of spatial scan statistics, is not sensitive to the density of cropland, and it is not as subjective.
These heatmaps offer some insight into the distributions of different types of conservation conflict, but the visual interpretation of these heatmaps is sensitive to the density of cropland, and it is subjective.
Reseeding grasses into degraded cropland and using it as permanent secondary pasture may combat desertification and promote sequestration of soil organic carbon (SOC).
However, if expansion of irrigated area is constrained, either due to insufficient water or due to insufficient pumping capacity, then it is likely that more cropland area will be required to meet the additional global demand induced by ethanol production.
