SciDev.Net: Reducing carbon emissions in China doesn’t have to be expensive — there is huge potential for storing carbon in the soil, says botanist Jiang Gaoming. There are 1.2 million square kilometres of farmland in China, with an average carbon storage capacity of 1.2 tonnes per square metre. But countries have a history of using, rather than managing, land, which depletes the organic content of soil and releases carbon dioxide into the environment. The organic content of soil in …