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Agriculture Investment

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    Plant mixtures differ to a large extent in nitrogen (N) composition. Nitrate-N: ammonium-N ratios vary according to raw material contents. The optimum nitrate: ammonium-ratio is close to 3:1 while 100% ammonium-N could impair plant growth and yield (Adriaanse 1990).

  •                                                                                                                                                                   

                                                                                                                                                    

    Inorganic nitrogen (N) dissolved in groundwater could be lost for crop production through downward and sideway movements of groundwater, resulting in lower yields and profit margins above costs. Differences in leaching between N sources can effectively be utilised to reduce the risk of N leaching.

  • Researchers at Ben-Gurion University of the Negev say they have conducted a pilot study that showed that raw human excrement can potentially be converted to a safe, reusable fuel and a nutrient-rich fertilizer.

  • Diversified chemicals group Omnia says its innovative nitrophosphate plant under construction in Sasolburg will materially improve the company’s overall competitiveness in the production of fertilisers, despite an upward revision to the project’s capital cost.

  • High crop yields often come under scrutiny because of the fertilizer levels needed to produce such yields and because of the perception and reality of the potential environmental impacts of those inputs.

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