Cereal yields have not increased greatly in Australia over the past 30 years and they are still only about half the potential determined by rainfall. One of the reasons for these low yields is our fragile soils, worsened by traditional systems of tillage and the burning of stubble. These systems reduce the levels of organic matter and biological activity in soil
"How stubble affects organic matter, plants and animals in the soil,"
Journal of the Department of Agriculture, Western Australia, Series 4: Vol. 33
, Article 9.
Available at: http://researchlibrary.agric.wa.gov.au/journal_agriculture4/vol33/iss1/9