Nature - 2nd prize
Jackie Ranken
01 February, 2001
A mob of sheep is on the move beside rows of pine trees in the Goulburn area, where sheep and cattle grazing form the primary land use. Australia is a dry continent, in which water is precious and topsoil fragile. Deforestation and land clearance have led to soil erosion and problems with soil salinity. Deforested areas are being replanted with pine, one of the few trees that will grow in these denuded areas. Some environmentalists would prefer the use of native eucalyptus, as they recover better from fire and don't make the soil acidic. But pine trees grow faster, and if planted in rows more than five deep can offer farmers an economic payoff.