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  • Sewage sludge can be used to improve forestry soil properties, because it is rich in phosphorus, nitrogen and organic material and, thus, can enhance the growth of tree seedlings in poor quality soils. The study was performed on a site amended
  • . There was a need to protect boundaries (walls) of the blowout from deflation and to encourage sand-dune accretion. The field experiment described in the paper was performed to establish vegetation on the ‘walls’ and base of the blowout to stabilize the feature