Olympic Technology by John Lockyer

By John Lockyer

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Chang. 13, 51–59. Kennedy D. (2007) The biofuel conundrum, Science 316, 315. W. (2007) The myth of nitrogen fertilization for soil carbon sequestration, J. Environ. Qual. 36, 1821–1832. , Jiggins J. (2008) Agriculture at a crossroads, Science 320, 320–321. N. (2006) Effect of manure application on crop yield and soil chemical properties in a long-term field trial of semi-arid Kenya, Nutr. Cycl. Agroecosys. 76, 341–354. D. (2004) Carbon sequestration and saving potential associated with changes to the management of agricultural soils in England, Soil Use Manage.

13, 437–450. Lal R. (2004) Soil carbon sequestration impacts on global climate change and food security, Science 304, 1623–1627. Lal R. (2006a) Enhancing crop yield in the developing countries through restoration of soil organic carbon pool in agricultural lands, Land Degrad. Dev. 17, 187–209. Lal R. (2006b) Managing soils for feeding a global population of 10 billion, J. Sci. Food Agr. 86, 2273–2284. Lal R. (2007) Soil science and the carbon civilization, Soil Sci. Soc. Am. J. 71, 1095–1108. , Hanson J.

Therefore, addition of cover crop biomass is essential to increasing total soil C accumulation. Incorporating cover crop in the rotation cycle is even more significant for the cotton (Gossipium hirsutum)-based systems in Alabama to enhance SOM and improve soil quality (Paudel et al. 2006). In addition to the amount of chemical composition of crop residues, accumulation of SOM in soil using higher residue-producing conservation systems and manure is also scale-dependent. On the basis of their data from a 9-ha field in Alabama, Terra et al.

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