Not only decreasing emissions, likewise means for storing more carbon in plants are more or less effective to mitigate the climate problems.
1.) Increasing woodlands, stripes - often helping agricultural productivity by a good microclimate - is a quite natural way, that began in the carbon age.
2.) Organic agriculture can increase the carbon content of the soil, at least in temperate climates.
Nature is more productive in the tropics, plants growing faster, therefore forests could capture more CO2 there - unfortunately the destruction of forests there continues and is a major source of emissions.
I am not sure with the specific country. But, the tree plantation and improved life style may be the best options for lowering CO2.
Of course, growing trees store carbon, so that reforesting and protected forests seem to be very effective to collect carbon. In addition, increased moisture would be favourable in all climates, wetlands had to be conserved as well as virgin forests.
The natural plant cover of the earth contains probably the maximum an carbon possible, with the largest variety of species and the best resistivity against weather and climate influences.
The human activities can profit in many ways, if the natural cover is not changed to much - depending on many factors.
In central Europe forests, meadows and fields are nearly in equilibrium; forest areas and protected forests are increasing only slightly. Their effects might be counterbalanced by using fields more intensively or extending fields at the costs of meadows.
From samples in Western Europe countries north of the Alps Schulz et al. concluded that fields are sources, meadows and forests sinks of carbon.
Schulz E.D. et al. Nature Geoscience 2, 842-850 (2009) Global Change Biology 16, 1451-1469 (2010)
In the northern limestone Alps ist was found that the soil loses humus and thus carbon through mineralization.
This effect is attributed to the human nitrate emissions of the last 20 years, not to erosion - there were holes found within the soil, not losses at the surface.
Ref. in parts: Gangkofner R., Göttlein A. AFZ - Der Wald 2014,69 (5) ( AFZ = Allgemeine Forstzeitung )
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