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Figure 20
Effect of aluminium on phalaris. The plant on the left has zero aluminium,
whereas the plant on the right has 2 ppm of aluminium. (
Soil Sense
C-07)
Figure 21
Plants vary in tolerance to soil acidity. Barley is highly susceptible to aluminium
(left), whereas lupins are very tolerant (right). (
Soil Sense
C-07)
Figure 27
Sheet erosion.
(Photo by Lynn Betts, USDA Natural Resources Conservation Service)
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