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Earth System Science and Sustainability
Land and Soil
Salinity   5.7 m ha  17 m ha in 50 years,  $187 m / yr cost to profitability
Sodicity  30 x salinity area, $1035 m / yr
Acidity    5 x salinity area (x 2-3 in 50 yr), $1585 m / yr
Erosion   0.5 10 T / ha / yr on 50 % agricultural lands
Soil structural decline
Loss of soil carbon
Low fertility
Acid sulphate soils