My trivial problem concerns the calculation of so-called "Grass Tetany Factor": My own calculation according to the formula: GTF = K/39.1/(Mg/12.15+Ca/20.04) is almost always lower compared to the data in the original papers. Where am I making mistake? Many thanks for kind advice
Andrew Paul McKenzie Pegman
Your formula is correct. But some papers simply use K/(Mg + Ca), and some use soil cations whereas others use forage cations, so these factors may be the cause of the discrepancy :)
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