What's the problem with deep ploughing?
Ploughing can cause the development of plough-pans, soil compaction, is detrimental to the vertical burrowing of earthworms and damages the stratified layers of soil life that develops in an undisturbed soil. There has been a steady increase in ploughing depth with modern machinery.
What are the easy steps we can take to reduce nitrous oxide (silver award)? See the Nitrous Oxide (N20) briefing sheet for more detailed explanation. N2O is a greenhouse gas that is 310 times more potent that carbon dioxide and N2O also destroys the stratospheric ozone. Incorporate main fertility inputs - green manure / grass leys, compost, mulch and manure in spring. Avoid incorporating fertilisers into warm, wet soils.
There was an investigation into home composting in aerobic or anaerobic (aireless and wet) conditions. In aerobic conditions when oxygen is present only carbon dioxide is released. However, in anaerobic conditions the more potent methane and nitrous oxides are released.
Therefore one tonne of aerobic home-made compost releases 3.9kg CO2e whereas one tonne of anaerobic (airless and smelly) compost releases a three hundred and eighty five times increase at 1502kg CO2e. Consult the textbook Growing Green for best small-scale composting practice.