Reducing phosphorus leaching from sandy soils with red mud bauxite processing residues [Western Australia]
1989
Vlahos, S. | Bell, D.T. (Western Australia Univ., Nedlands. Dept. of Botany) | Summers, K.J. (Alcoa of Australia Ltd, Applecross) | Gilkes, R.J. (Western Australia Univ., Nedlands. School of Agriculture)
Using field lysimeters, addition of 500 t per ha red mud neutralized with gypsum or 200 t per ha red mud neutralized with copperas was found to reduce the leaching of P to below 3 kg per ha for application rates of 270 and 80 kg P per ha, respectively, to a very sandy Swan Coastal Plain soil. Water retention was increased by 14 and 50 percent by the addition of 200 and 2000 t per ha red mud, respectively. High total soluble salt levels associated with high levels of residue application may affect pasture production in the years immediately following soil amendment.
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