This was one of the key messages from InteliGro’s Farmers’ Day at the 92nd Swartland Show in Moorreesburg. Soil scientist Jan van Zyl challenged producers to look beyond average soil test results after researchers encountered fields where crops showed magnesium and potassium deficiencies despite analyses indicating adequate nutrient levels. Presenting findings on chemical stratification in long-term minimum-tillage systems, Van Zyl explained tha…
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