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    Soil water sensors reveal subsoil conditions – Part 4: Frequency delay measurements by means of capacitance and heat pulse measurements

    by Frikkie Koegelenberg, Pr Eng and Hendrik Jordaan Frequency delay measurement is based on the measurement of the dielectrical constant of soil or materials. The frequency delay measurement is also called the radio frequency (RF) capacitance technique. We thank the ARC Agricultural Engineering in South Africa for making their manual on soil water sensors available […] More

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    Soil preparation: Seize the big window of opportunity this planting season!

    Opinion piece by Dr Ben Ngwene, AGCO While the Southern African region endures a persisting drought that started back in October 2018, planting season 2019 is fast approaching. Farmers have to make crucial decisions on how to recover from last season’s double-digit decline in crop harvests. Land preparation is where everything begins. This is the […] More

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    Soil water sensors reveal subsoil conditions

    Part 1: The feel method, gravitational soil water determination and electric resistance by Frikkie Koegelenberg, Pr Eng and Hendrik Jordaan Every farmer knows: If you apply too little water, your crops suffer; if you apply too much water, your bank account suffers. The decision depends on accurate knowledge of your soil water status. Fortunately, there […] More

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    SOIL: The producer’s most important asset

    ProAgri Zambia acknowledges Grain SA for the use of this series which originally appeared in Afrikaans in SA Graan/Grain. Martiens du Plessis, Soil Scientist, NWK Limited & Prof Cornie van Huyssteen, Lecturer: Soil Science, University of the Free State In the series ”Soil: The producer’s most important asset” the most important soil properties that influence […] More

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    SOIL: The farmer’s most important asset

    ProAgri Zambia acknowledges Grain SA for the use of this series which originally appeared in Afrikaans in SA Graan/Grain. Martiens du Plessis, Soil Scientist, NWK Limited & Prof Cornie van Huyssteen, Lecturer: Soil Science, University of the Free State In the previous two articles of this series, we discussed the first nine soil groups according […] More

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    SOIL: The farmer’s most important asset – PART 25: Soil classification (ii)

    By Martiens du Plessis, Soil Scientist, NWK Limited & Prof Cornie van Huyssteen, Lecturer: Soil Science, University of the Free State ProAgri Zambia acknowledges Grain SA for the use of this series which originally appeared in Afrikaans in SA Graan/Grain. When a specific body of soil is classified, the properties thereof may be easily communicated. […] More

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    SOIL: The farmer’s most important asset – PART 24: Soil classification (i)

    ProAgri Zambia acknowledges Grain SA for the use of this series which originally appeared in Afrikaans in SA Graan/Grain. In the previous two articles in this series, the soil formation factors and processes were discussed. With these factors and processes in action, it gives rise to a variety of chemical, physical and morphological characteristics. These […] More

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    SOIL: The farmer’s most important asset – PART 23: Soil formation processes

    ProAgri Zambia acknowledges Grain SA for the use of this series which originally appeared in Afrikaans in SA Graan/Grain. Soil does not form by chance, but as a result of the influence of the five soil formative factors: climate, organisms, topography, mother material and time. These soil formative factors control the soil formation processes that […] More

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    SOIL: The farmer’s most important asset

    By Martiens du Plessis, Soil Scientist, NWK Limited & Prof Cornie van Huyssteen, Lecturer: Soil Science, University of the Free State ProAgri Zambia acknowledges Grain SA for the use of this series which originally appeared in Afrikaans in SA Graan/Grain. Soil does not form by chance, but as a result of the influence of climate, […] More

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    in

    SOIL: The producer’s most important asset

    Martiens du Plessis, Soil Scientist, NWK Limited & Prof Cornie van Huyssteen, Lecturer: Soil Science, University of the Free State ProAgri Zambia acknowledges Grain SA for the use of this series which originally appeared in Afrikaans in SA Graan/Grain. Soil is the most fundamental resource for the farmer, without which food and natural fibre cannot […] More

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    SOIL: The farmer’s most important asset

    Martiens du Plessis, Soil Scientist, NWK Limited & Prof Cornie van Huyssteen, Lecturer: Soil Science, University of the Free State ProAgri Zambia acknowledges Grain SA for the use of this series which originally appeared in Afrikaans in SA Graan/Grain. Soil is the most fundamental resource for the farmer, without which food and natural fibre cannot […] More

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    Reclaiming acidic or alkaline soils by correct use of ETG’s lime products

    Soil pH is a measure of hydronium ion (H3O+, or more commonly the H+) activity in the soil solution. Activity is similar to concentration in non-salt affected soils. Soil pH influences many facets of crop production and soil chemistry, including the availability of nutrients and toxic substances, activities and the nature of microbial populations, as […] More

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