The Remaining Pillar Resources in the Northern Witbank-Highveld Coalfield
by Grant van Heerden & Vellies Veldsman | September 2003
R1500,00
Description
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What this report foundRehabilitated opencast soils carried pastures and cash crops, but compaction and cover soil depth set the ceiling on what they could produce.
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Rehabilitated opencast soils carried pastures and cash crops, but compaction and cover soil depth set the ceiling on what they could produce. Only land with deep cover soils suited maize and sunflower, and deep ripping with regular tillage was needed. Bulk density standards were not met at the trial sites, which the review judged enough to have changed the results.
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What this report foundIrrigation with calcium and sulphate rich mine water proved feasible and sustainable over eight years at a Mpumalanga colliery, with no significant impact on...
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Irrigation with calcium and sulphate rich mine water proved feasible and sustainable over eight years at a Mpumalanga colliery, with no significant impact on soil, surface water or groundwater. Sugarbeans, wheat, maize, potatoes and pastures were grown on a commercial scale. High calcium and magnesium suppressed potassium uptake, and waterlogging from poor site selection was the main problem.