Effects of three soil tillage systems on some biological activities in an Ultisol from southern Chile. The utility of ploughing was first questioned by a forward-looking agronomist in the s, Edward H. An added economic consideration is that tillage results in more wear and tear on machinery and higher maintenance costs for tractors than under zero-tillage systems. Climate change and conservation agriculture Lal suggested that by adopting improved management practices on agricultural land use of NT and crop residuesfood security would not only be enhanced but also offset fossil fuel emissions at the rate of 0. B, Selles F, Curtin D.
Conclusions Crop production in the next decade will have to produce more food from less land by making more efficient use of natural resources and with minimal impact on the environment.
There was a problem providing the content you requested
Animals also emit methane, a greenhouse gas 21 times more potent for global warming than carbon dioxide Grace et al. An added economic consideration is that tillage results in more wear and tear on machinery and higher maintenance costs for tractors than under zero-tillage systems. Recent papers confirm this observation; Madari et al. The three key principles of CA are permanent residue soil cover, minimal soil disturbance and crop rotations. Methane emissions that have a warming potential 21 times that of CO 2 are common and significant in puddled anaerobic paddy fields and also when residues are burnt.