Australian soils are generally low in phosphorus because:
A. They have been subjected to weathering for a long time
B. Too much water has been extracted from underground aquifers
C. Water flows are pulsed by variable rainfall
D. Plants have used up all the available phosphorus over thousands of years (X)
E. Grazing has been widespread in Australia for the last 200 years
A. They have been subjected to weathering for a long time
B. Too much water has been extracted from underground aquifers
C. Water flows are pulsed by variable rainfall
D. Plants have used up all the available phosphorus over thousands of years (X)
E. Grazing has been widespread in Australia for the last 200 years